Use appropriate template loaders when compressing for offline use.
Handle TemplateSyntaxError when loading with a TemplateLoader.

Put raise OfflineGenerationError back in place.
Revert "Handle TemplateSyntaxError when loading with a TemplateLoader."

This reverts commit 4319ae70d210fad2f05997df9ffca9cf5025308b.
Revert "Use appropriate template loaders when compressing for offline use."

This reverts commit ec9a9c49b90bc5f2236f702d9d2c56dbb1031f12.
Use get_template from Django to load templates so that templates are
loaded with the appropriate template loader.
Hashcompat is deprecated in django > 1.5.
Merge HAML/SASS compatibility hacks.

Conflicts:
	.gitignore
	compressor/cache.py