DoubleX RMMV Permanent States

Lets you sets some states to be kept/restored in some set cases

*============================================================================
 *    ## Notetag Info                                                         
 *----------------------------------------------------------------------------
 *    # State Notetags:                                                       
 *      1. <permanent state: scene, type>                                     
 *         - scene can be either battle or map, meaning the state can be      
 *           restored in battle or map respectively                           
 *         - type can be either persist, recover or revive, meaning the state 
 *           will be kept upon death or recover all, or added back upon revive
 *           respectively                                                     
 *         - The same state can have more than 1 permanent state scene/type   
 *============================================================================
 *    ## Plugin Call Info                                                     
 *----------------------------------------------------------------------------
 *    # State manipulations                                                   
 *      1. meta.permanentStates                                               
 *         - Returns the permanent state scenes and types in                  
 *           <permanent state: scene, type> in the form of                    
 *           { battle: types, map: types } with types being an Array storing  
 *           all unique String type or an empty Array if scene matches and    
 *           doesn't match the property name storing types respectively       
 *      2. meta.permanentStates = [scene, types]                              
 *         - Sets the permanent state scene and types in                      
 *           <permanent state: type> as { battle: types, map: types } with    
 *           types being an Array storing all unique String type which will be
 *           used in the scene matching the property name storing types       
 *         - All meta.permanentStates changes can be saved if                 
 *           DoubleX RMMV Dynamic Data is used                                
 *============================================================================

*      v1.02c(GMT 0100 4-12-2015):                                           
 *      1. Fixed undefined all array function which should be empty instead   
 *      2. Increased this plugin's compactness, efficiency and robustness     
 *      v1.02b(GMT 0800 2-12-2015):                                           
 *      1. Fixed reading repetitive notetag values due to typo bug            
 *      2. Fixed permanent state type persist not working due to typo bug     
 *      3. Fixed null permanent state container due to wrong init timing bug  
 *      4. Fixed undefined $gameParty upon actor initializations bug          
 *      v1.02a(GMT 1400 1-12-2015):                                           
 *      1. <permanent state: type> has changed to                             
 *         <permanent state: scene, type>                                     
 *      2. Added new permanent state type recover restored upon recover all   
 *      3. The same state can now have more than 1 permanent state type       
 *      4. Removed param allStatesPermanent in the plugin manager             
 *      5. Fixed undefined permanent state containers upon loading savefiles  
 *      v1.01h(GMT 0600 29-11-2015):                                          
 *      1. Fixed clearing all states upon calling Recover All event command   
 *      2. Fixed notetags not reading at all due to treating "null" as falsey 
 *      v1.01g(GMT 0300 29-11-2015):                                          
 *      1. Fixed undefined error due to non persist nor revive poermanent type
 *      v1.01f(GMT 1200 27-11-2015):                                          
 *      1. Fixed undefined state_id in store_permanent_states due to typo bug 
 *      2. Increased this plugin's efficiency, readability and robustness     
 *      v1.01e(GMT 0900 25-11-2015):                                           
 *      1. Fixed wrong number of arguments when loading state notetags bug    
 *      2. The aliased functions can be accessed by other custom plugins now  
 *      3. Exposed the state plugin calls that can access the notetag values  
 *      v1.01d(GMT 1600 6-11-2015):                                           
 *      1. Simplified the notetag reading mechanisms                          
 *      2. Fixed undefined this under forEach bug                             
 *      v1.01c(GMT 1300 5-11-2015):                                           
 *      1. Fixed undefined this under DoubleX_RMMV.Permanent_States bug       
 *      v1.01b(GMT 0000 5-11-2015):                                           
 *      1. Fixed failing to load notetags due to nil $dataStates bug          
 *      v1.01a(GMT 1300 4-11-2015):                                           
 *      1. The notetag <permanent state> has changed to <permanent state: type>
 *      2. Fixed several logic and syntax errors                              
 *      3. Increased this plugin's maintainability                            
 *      v1.00a(GMT 0800 31-10-2015):                                          
 *      1. 1st version of this plugin finished

DoubleX(Optional)

//      You shall keep this plugin's Plugin Info part's contents intact       //
//      You shalln't claim that this plugin's written by anyone other than    //
//      DoubleX or his aliases                                                //
//      None of the above applies to DoubleX or his aliases                   //