change volley module -> need to fix with server API
change sendBody parameter, from _ parameter to none (just concat, do not touch capital
warning in activity_study_room
can build w/ Generated Signed Key
add API module
change studyroomactivity layout, TODO : check when the additionalPageOpen, don't show soft-keyboard
don't show soft-keyboard done
AuthNextAcitivty authPost, authGet
delete comment
add HttpAPI in TabActivity
RegisterAcitivy registerPost, but receive 400 httpResponse

TODO : check receive 200 code response and request acheivetimePutRequest
RegisterActivity timePutRequest

TODO : check this API with Server
add HttpAPI in TabActivity
arge APIModule
Merge APImodule
in InviteFriendsActivity -> createLifRoomPost, createSubjectRoomPost, inviteFriendToRoomPost

in ScoreViewAcitivyt -> getFriendsScorePost
merge
InviteFriendsActivity -> getFriendsRequest
MyProfileActivity -> getMyInfoGet, updateMyInfoPut
AddFriendActivity -> addFriendRequest