Add pure-sass install generator.
Revert "Bump version for great justice (and @deanperry)"

This reverts commit c16c3e9dac38217d09cf9315cbf2c1047d9e22e0.
Get generator scripts working with initial spec.
Add tests for subdirectories.
Ignore the sass-cache.
Add dependencies for install command.
Don't revert version.
Test version command.
Make fakefs not override tempfile.
Nuke legacy test stuff.
Merge pull request #5 from johnotander/master

Add `$ pure-sass install` and `$ pure-sass -v` command line abilities.