Rename generator runtime context for composability

More info http://yeoman.io/authoring/running-context.html
v0.4.12

Update assemble 0.4.40. Ref #532

Also update yeoman-generator for gruntfile editor support
Update deps
Update unit testing
Fix author name and username
Update deps
Module installed before but not used
Use bower for bootstrap assets management
v0.5.0

* 52fc86b Use bower for bootstrap assets management
* 0ca1e9c Module installed before but not used
* bfcc97c Update deps
* 2a6bf48 Fix author name and username
* 2df02d3 Update unit testin
Note when generating in sub folder

Closed #42
Merge pull request #1 from assemble/develop

Develop