Refs #4476: Refactors for simplecache that make it friendlier to other types of files
Trying to guess mime-type for ajax views
Refs #4476: Cached views served properly again.
Instantiating correct class for CSS minification
Refs #4476: Simplecache no longer appends file extension automatically
Updates simplecache docs
Stop forcing text/html as default
Makes elgg_get_simplecache_url symmetrical with elgg_register_simplecache_view
Fixes js i18n for new simplecache urls
Unifies API for registering external views
Merge pull request #519 from ewinslow/simplecache-refactor-b4476

Refs #4476, #4494: Simplecache refactors for better AMD + static view file support