Fixed bug with doubling assets_dir in file paths
Tons of bugs fixed + Docs

- Redundant mtime checking for css removed
- Bug with “appending only” for js file
- Bugs, bugs, bugs…
Update README
Rename minify.php to Minify.php
Merge pull request #2 from kakysha/master

Fixed tons of bugs + Documentaion improvements + CI3.0 support