Add rbenv dot files.
Ignore config/local_env.yml file.
Load local environment variables from congif/local_env.yml.
Clean up stylesheets.

Remove generated stylesheets. Add sibata.css.
Add base heading and table style.
Add base form style.
Style notice.
Add base anchor style.
Use SASS variables.
Merge branch 'sibata_style' of https://github.com/speck/sibata into speck-sibata_style

Conflicts:
	app/assets/stylesheets/tabs.css.scss
	app/views/tabs/_form.html.erb