Merge pull request #133 from Tradeshift/master

Make spirits optional (in progress)
Hotfix $shutdown
Merge pull request #134 from wiredearp/master

Hotfix $shutdown
Project structure (in progress)
More project structure
Spring cleaning
Merge pull request #135 from wiredearp/master

Spring cleaning
Formal modules
Merge pull request #136 from wiredearp/master

Formal modules
Bump grunt-spiritual-edbml
More fun with modules