#14 make CdoManager interface transactional
#25 add experimental JSON file store to verify SPI
#14 make CdoQuery interface transactional
Merge remote-tracking branch 'origin/master'

Conflicts:
	impl/src/main/java/com/buschmais/cdo/impl/CdoManagerFactoryImpl.java
	impl/src/main/java/com/buschmais/cdo/impl/CdoManagerImpl.java
#14 make CdoQuery interface transactional