v2 stable release

• complete refactoring - thx to https://github.com/KES777 for extensive testing
• fixed many edge case issues from v1
• removed class FormDataJsonOptions. Use bare {} objects now as options
• removed method FormDataJson.flattenJsonFormValues. Use flatList = true option in toJson. Note: Output still has changed significantly to v1.
• changed method FormDataJson.setInputValue and is now considered internal only. No direct replacement. Use fromJson if you need to set any input value
• removed 3rd parameter formToJson/toJson callback function. It is now set into option filesCallback
• renamed method formToJson to toJson
• renamed method fillFormFromJsonValues to fromJson
• renamed option unsetAllInputsOnFill to clearOthers
• renamed option includeUncheckedAsNull to uncheckedValue and now represent the value that unchecked inputs should have in output
• added option skipEmpty
• added option fileReaderFunction
• added option triggerChangeEvent
• added option resetOthers
• added method clear
• added method reset
• added unminified compiled file
• optimized compiled files