chore(): update version to 0.4.0
chore(): update changelog
fix(build): added explicit module dependency on ngAria
chore(package): add dgeni dependency back
chore(): fix package.json ver
docs(dialog,bottomSheet): remove reference to old hide function

closes #392
enhance(docs): copy enable source, added Material video

Added Material Design YouTube video to docs homepage.

Closes #370
Closes #389
docs(): Fix button styles in Firefox for Android
docs(toast,bottomSheet): document parent option
Update BUILD.md
fix(interimElement): lookup default parent on show call

closes #414
wip: docs refactor

change gulpfile

add watch-module, server task

add material prefix