Dropped ruby 1.9.3 support
Merge pull request #11 from ryog/remove_old_ruby_version_support

Dropped ruby 1.9.3 support
Change spring to zeus

Add guard gems.
Merge pull request #12 from ryog/change_spring_to_zeus

Change spring to zeus
Update and Remove gems
Merge pull request #13 from ryog/update_gems

Update and Remove gems
Implement projects design
Merge pull request #14 from ryog/top_design

Implement projects design
Merge pull request #15 from ryog/develop

Merge develop to master