Better usage of holiday gem to include long weekends
Updated README to include the comment for adding the long weekend
Merge pull request #53 from mengqing/improve_readme

Better usage of holiday gem to include long weekends
Merge branch 'develop'
bumping to 0.7.0.  While there aren't any api changes, we've bumped a bunch of gem versions, dependencies of ruby, etc. and I want to give some versioning 'distance'.