prefix all grid mixins and variables
all grid calculation in #grid bundle, prefix all grid mixins and variables
use prefixed mixins in examples
update docs with prefixed grid mixins
ignore node modules
prefixed responsive helper in docs
grid generation api
add simple, compilable less file
generate simpler grid selectors
reduce grid setup to two mixins
reduce grid generation mixins to two
better mixin naming and correct comment in responsive layouts example
new name with version 2.0.0: Spartan
Merge branch 'release/2.0.0'