Move configuration adapters to compass core.

Closes #1739.
Handle reporting errors that are not sass errors.
Sprite names are case insensitive.

Fixes #1740.
Fix sprite logging.

Fixes #862.
Add support for quiet compilation.

Fixes #862.
Fix for import once with sprites.

Fixes #1720.
Version 1.0.5
Changelog for 1.0.0.rc.1
Bump version to 1.0.0.rc.1.
Bump version to 1.0.0.rc.1.
moved valid extensions down to the engine level so engines can be built allowing jpg, gif, etc
updated documentation
added sprites folder
updated core git ignore
created sprites gemspec
move over sprite tests
WIP refactoring tests to use def test
convert to test unit format
WIP tests
move test helpers