DoubleX RMMV Popularized ATB Start

Lets users alter individual battlers' atb value on battle start

*============================================================================
 *    ## Notetag Info                                                         
 *----------------------------------------------------------------------------
 *    # Actor/Class/Weapon/Armor/Enemy/State Notetags:                        
 *      State notetags take the highest priority, followed by enemy, weapon,  
 *      armor, class and actor                                                
 *      1. <operator patb start: val>                                         
 *         - Assigns val to the battler's atb value on battle start via       
 *           operator                                                         
 *         - operator can be either =, +, -, *, / or %, meaning set to, add   
 *           by, subtract by, multiply by, divide by or modulo by respectively
 *         - All instances of this notetag will be used sequentially          
 *         - The final atb value on battle start will become                  
 *           max_atb_val - atb value on battle start for atb fill code delay  
 *============================================================================
 *    ## Plugin Call Info                                                     
 *----------------------------------------------------------------------------
 *    # Data Actor/Class/Weapon/Armor/Enemy/State manipulations               
 *      1. meta.patb_start                                                    
 *         - Returns the atb value on battle start with the operator stored in
 *           <operator patb start: val> in the form of [opeartor, val]        
 *      2. meta.patb_start = [opeartor, val]                                  
 *         - Sets the atb value on battle start with the operator stored in   
 *           <operator patb start: val> as string operator and Number val     
 *         - All meta.patb_start changes can be saved if                      
 *           DoubleX RMMV Dynamic Data is used                                
 *============================================================================

*      v1.00a(GMT 0500 23-1-2016):                                           
 *      1. Fixed undefined DataManager.this bug                               
 *      2. Fixed not loading this plugin's notetag bug                        
 *      3. Fixed starting atb value possible to be under min or over max bug  
 *      4. Fixed not passing arguments in set_start_patb_val bug              
 *      5. Deleted some meaningless, pointless and useless documentations     
 *      6. 1st completed version of this plugin finished                      
 *      v0.00a(GMT 1400 29-11-2015):                                          
 *      1. 1st testing version of this plugin finished

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 *      DoubleX or his aliases                                                
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