Added MenuItem constants.
Configuration separated by stages.
Added application command 'sync' that will allow developer to synchronize packages via different stages.
Modules and events information moved to static config file, that will be generated by system.
Packages manifest format changed to json.
Removed 'return' blank line before check from phpcs.
Added missing directory 'libraries'.
Added missing directory 'plugins'.
Fixed package upload.
Fixed toJson widgets select in package model.