#JC-1504 Added ForumUtils class to usage in controllers. prepareRequestedPage method moved from TopicController to ForumUtils. Designed specified page checking for inbox and outbox messages.
Merge remote-tracking branches 'origin/master' and 'origin/master.senleft'
#JC-1504. ForumUtils class removed. Added additional constructor to JCommunePageRequest to fixing not valid page creation. Tests fixed.
#JC-1504. Tests fixed.
Merge remote-tracking branch 'origin/master'
Merge branches 'master' and 'master.senleft' of https://github.com/jtalks-org/jcommune

Conflicts:
	jcommune-model/src/main/java/org/jtalks/jcommune/model/dao/PrivateMessageDao.java
#JC-1504 Removed ForumUtils class. JCommunePageRequest now is only page navigation logic handler. JCommunePageRequest api adjusted to process specified page as string.
Merge branch 'master' of https://github.com/jtalks-org/jcommune
Merge branch 'master' of https://github.com/jtalks-org/jcommune
Merge branch 'master' of https://github.com/jtalks-org/jcommune
Merge branch 'master' of https://github.com/jtalks-org/jcommune

Conflicts:
	jcommune-view/jcommune-web-controller/src/main/java/org/jtalks/jcommune/web/controller/TopicController.java
	jcommune-view/jcommune-web-controller/src/test/java/org/jtalks/jcommune/web/controller/BranchControllerTest.java
#JC-1504 JCommunePageRequest renamed to PageRequest. Removed unused setters from PageRequest. Usage of static PageRequest factory method changed to constructor.
Merge branch 'master.jc1504.pagination'
Merge branch 'master' of https://github.com/jtalks-org/jcommune
#JC-1504 Added licence header.