Squashed commit of the following:

commit 31ecb99fc3d9e6fe231db5e25d6e7c141c61813e
Merge: 5e1b410 ad1828a
Author: timnitanda <nitanda@timedia.co.jp>
Date:   Thu May 23 12:13:07 2013 +0900

    Merge remote-tracking branch 'remotes/timnitanda/develop/develop' into develop

    Conflicts:
    	README.md

commit 5e1b410c400b777ef848501a5a106db9b6c5a8da
Merge: 501d045 b086924
Author: timanymous <timanymous@timedia.co.jp>
Date:   Wed May 22 19:36:39 2013 -0700

    Merge pull request #4 from timnitanda/issue3

    add GitHub sub menu.

commit b086924018c53d1e4c2dff9e6828d3ca23448434
Author: timnitanda <nitanda@timedia.co.jp>
Date:   Thu May 23 11:34:26 2013 +0900

    add GitHub sub menu.

commit ad1828a57d8711030573f3a803c89702fd7051e2
Author: timnitanda <nitanda@timedia.co.jp>
Date:   Thu May 23 11:05:21 2013 +0900

    Bitbucket蜈ｨ繝｡繝九Η繝ｼ繧定ｿｽ蜉
縲・
commit 501d04528ee6fb63cc91d8ab18410ca5872aef52
Merge: 993df6b 8827778
Author: timanymous <timanymous@timedia.co.jp>
Date:   Wed May 22 18:25:44 2013 -0700

    Merge pull request #2 from timnitanda/develop

    add GitHub all menu

commit 88277782f776dc0a0eae73228fdb9edf16461ef0
Author: timnitanda <nitanda@timedia.co.jp>
Date:   Wed May 22 20:37:38 2013 +0900

    add GitHub all menu