Refactor engine.
Add locale spec.
Cleanup feature spec and change syntax.
Updated readme.
Add guardfile.
Cleanup settings.

Use only "edit" view same as General Settings etc. so it follow same
pattern.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>

Conflicts:
	app/overrides/include_rich_text_js.rb
Set dependency version for ckeditor.
Add Swedish locale.
Fix so specs pass.
Bump tinymce-rails to 4.0.2

- New version is retina ready.
- Cleanup old plugins and settings.
Add translations for tinymce.

Only include those languages that are more or less 100% translated in
spree_i18n.
Bump version to 2.1.0
spree 2.1
spree 2.1