add STMEntityController

#137
intermediate commit
intermediate commit
intermediate commit
finish stc.entity in core data

closes #137
remove unnecessary comments
remove code duplicate
prevent STMEntity duplicate
skip entity with nil url
new way to flushing objects
Merge branch 'dev' into stc.entity
Merge branch 'stc.entity' into editPartner&Outlet

Conflicts:
	iSistemium.xcodeproj/project.pbxproj
	iSistemium/Resources/en.lproj/Localizable.strings
	iSistemium/Resources/ru.lproj/Localizable.strings
resolve conflicts