add avatar image crop, files controller

- Files controller applied on avatar upload experimentally
Merge branch 'master' of http://hive.nhncorp.com:80/dlab/hive into file-uploader-130806
add modification of milestone and assignee
add label link on issue view page
add filter on issue tab link
Merge pull request #78 from laziel/yobi refs/heads/file-uploader-130806
Merge pull request #79 from alecsiel/yobi refs/heads/issue-view
Merge pull request #61 from alecsiel/yobi refs/heads/issue-etc
Label: Fix Project Label by rollback 9fbbb55d.

The commit braked common Typeahead library.
convention: Fix a line which is too long.
Allow users to search projects by label's name.