Changed host addresses from IP do DNS
Considering next page token when fetching songs from GDrive
Gdrive nextPageToken processing moved into retriveAllFiles
#19 missing test fixed
REplaced hardcoded values with constants
Merge branch 'master' into 12_user_profile

Conflicts:
	test/app/BaseModelTest.java
- Optimized password encrypt call
- added restriction for execution some methods in AuthorizationApi only with session
- added simplified method for getUserFromSession
- implemented updatePassword method + tests
Added method which allow to users add login and password to their account
Implemented method for updating user personal info