Added `hash` option that adds a sha256 hash of all `src` files.
Updated test to include hash; improved base path handling with hash option; updated readme to include hash.
Added support for hashing of master files (tests included).
Added support for hashing of master files (tests included).
Readme tweaked.
Fixed test (line breaks)
Merge remote-tracking branch 'upstream/master'
Added process option this is a function that processes file name before outputting them to the cache manifest.
Merge pull request #28 from muxa/master

Add option to use content hash instead of timestamp
Thank you!