fix for frozen config object
Merge pull request #19 from wprater/master

Added documentation for plugins and imports.
Merge pull request #20 from britco/master

Fix frozen object issues.
Release 1.6.1.
Push compiled stuff.
Update deps.
Compile stuff.
Use progeny module for dependencies detection
Merge branch 'master' of https://github.com/brunch/stylus-brunch

Conflicts:
	package.json