Use short hand github for Gemfile
Remove haml gem
Replace haml with slim in Guardfile
Compress all migration into 1

[resolve #214]
Refactor Author:

* Abit clean up
* Remove unecessary attributes check
* Simplify validation check with should-matchers
Merge branch 'joneslee85-refactor-gemfile'
Correct Gemfile typo
Merge pull request #212 from joneslee85/remove-haml

Remove haml gem
Merge pull request #213 from joneslee85/update-guardfile

Replace haml with slim in Guardfile
Merge pull request #215 from joneslee85/issue-214

Compress all migration into 1
Merge pull request #216 from joneslee85/refactor-author

Refactor Author:
Staging site will be back later