Add tests for asset host configuration
Use md5 as cache buster
Couple MD5 hash fixes, treat QA like production, and make better tests for multiple asset hosting, md5 cache busting and cache in general (all fixes needed for multiple asset host support)
Fix MD5 cache compatibility with filenames with dots (only match exact MD5)

- Updated tests accordingly
Add test for folder glob
Keep cache buster on development individual files

- ensures browsers refreshes when file changes and we have a single behavior to deal with