Renaming media.sh to asset.sh.
Removing check.sh.
Better document cache functions.
Homogenize docblocks; make clear what is optional and what not.
Reduce automatisms in cache functions.

Host and PHP interpreter must now be given as arguments to the functions.
Document new signature.
Cleanup.
Change media module name in README.
Drop support for uglify-js < 2.0; support new binary.
Adding support for source maps to compress_ functions; removing bundle_js; BC break.

Changing function signature of compress_js and compress_css. Those
functions now operate on multiple source files and require a target file to be specified.

Since compress_ functions now also bundle, bundle_js has been removed.
Make variables in cache function local; reword.
Removing check for APC module in cache_flush_apc.

It is assumed the user has the module installed if she invokes that function.
Default JS compressor to uglify-js.
Document dependencies for compress functions.
Show stats when using uglify-js.
Mark upcoming version as in progress.
Document change of default JS compressor in README, too.
Reduce line count in cache_flush_memcached.
Adding DOMAIN configuration.
Do not use realpath when detecting env; it may not be available.
Adjusting git protocol detection; to match known GitHub URLs.