SN-45, SN-46 changed entities for Posts and Private Messages.
Added links for Users and Posts. Added Dao for Post
Revert "SN-45, SN-46 changed entities for Posts and Private Messages."

This reverts commit a2904d7d3c3a9ac831b97056f133ff9a1a63b1e7.
Commit that i needed to get update
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/resources/hibernate.cfg.xml
Merge branch 'master' of https://github.com/Troshchuk/SocialNetwork

Conflicts:
	src/main/resources/hibernate.cfg.xml