Add tests for Git module
Change to use git commit id as Docker image name
Add system test for wercker
Add CAPITAL branch test
revert builder.rb as this is not related in issue #87
Merge pull request #89 from mookjp/issue-87_support-for-chapital-characters-for-branch-name

Support for capital characters for branch names
Changed method to match to branch
Add test to interpret -- as branch name
Merge pull request #92 from mookjp/issue-88_branch-name-with-symbol

Support for symbol characters for branch names
implement github integration
add doc about github integration
wip: add setup script for github_bot