in InviteFriendsActivity -> createLifRoomPost, createSubjectRoomPost, inviteFriendToRoomPost

in ScoreViewAcitivyt -> getFriendsScorePost
merge
InviteFriendsActivity -> getFriendsRequest
MyProfileActivity -> getMyInfoGet, updateMyInfoPut
AddFriendActivity -> addFriendRequest
change from status_code to statusCode
StudyRoomActivity TimePut, TimeRegister
StudyRoomActivity disconnectConnection
StudyRoomActivity getFriendsInRoomRequest
StudyRoomActivity kickOffMemberInRoomRequest
AddMoreFriendActivity getFriendsList
AddMoreFriendActivity inviteFriendToRoomRequest
GcmIntentService getStudyRoomsRequest
Quiz_Main looks don't using restAPI
Quiz_set answerRegisterRequest
Quiz_set questionRequest
Solve_Main questionRequest
Quiz_Main quizRegisterRequest
restore MainAcitivity
don't use -> as a comment