Version name and code bump for 2.6.3.
Fixed NPE in getMediaFileName()
Fixed NPE in isSiteId()
Merge pull request #1003 from wordpress-mobile/issue/1002-npe-media-file-name

Issue/1002 npe media file name
Merge pull request #1005 from wordpress-mobile/issue/1004-npe-followrow-issiteid

issue/1004-npe-followrow-issiteid
Merge branch 'master' into develop