Added proportions to modifiers

Famo.us 0.3.0 has added proportions to modifiers, this will add the
fa-proportions directive to the fa-modifier
typo
Build with proportions
another typo
added faObject to push famo.us object back to js
build
feat: support proportions on fa-modifier via fa-proportions

Merge branch 'master' of github.com:i11ume/famous-angular into i11ume-master
chore: PR clean up and documentation
test: add coverage for fa-proportions on fa-modifier
chore: update docs build