use roots 7.0.0 assets versioning setup
update gemfile versions
bump to 2.1.0
Merge branch 'release/2.1.0' into develop
use the_excerpt correctly, fixes #72
tutv_page_submenus not a filter, fixes #71

`$content` param should be removed since it's not filtering
`the_content` - this function is echoed within the template
bump version to 2.1.1
Merge branch 'release/2.1.1' into develop
Merge branch 'develop' into feature/de-thematic

Conflicts:
	assets/manifest.json
	lib/layout.php
	lib/scripts.php