bump version to 0.1.0
Merge pull request #3 from nealma/master

add 'history_releases_count' config option for auto clean old releases
fix bug of always re-git-clone
added config 'del_git_dir'
Merge pull request #4 from houjiazong/master

added config option 'del_git_dir'
resolve issue #4 #1
Update README.md
add mina bash completion
add bash completion support
Fix bug about config option "history_releases_count", sometimes would not remove all releases not need anymore
Bump version to v0.2.0
Updated README.md
rollback
keep history_releases_count >= 2