Merge branch 'master' into development

* master:
  Added another jpg file extension.
  Added phpunit config file, removed the composer demo installation.
  Fixing is404 undefined variable error.
  Including new demo sources and demo installation with Composer.
New development on the main caching class.
Major refactoring to handle better image conversion, compression, and caching.  Still not complete.
Renamed license to github standard.
New .gitignore changes
More gitignore changes.
New travis ci test procedure.
All source changes, docs changes, etc. to the latest.