remove unused var
ignore .sass-cache
#63: move handle_dsl_node to dsl
only include modules that have context functions
extension points
#63: use extension for dsl context result handler
eliminate vars
move run_in_context to context
fix #63: use extension points for vars
remove unused parameter
start to move context fns to contexts
split context and run context
input context
Merge branch 'master' into frp

Conflicts:
	src/app.coffee
	src/graphite.coffee
	src/notebook.coffee