Fixing an issue with using Munee in a sub-folder and combining files

Adding in support to run Munee in a sub-directory.

Fixing a RegEx for windows users who use Image Placeholders.

Adding in new CompilationException and removing cache file if it is c…

…alled. Also putting in new relative path fix for CSS stylesheets.

Fixing an issue with relative paths not converting to absolute paths …

…correctly. This should fix issue meenie#32.  I also implemented the feature requests in issue meenie#24, issue meenie#27, and issue meenie#21.

Merge pull request meenie#23 from elkangaroo/fix-php-warning-for-unca…

…ched-images

Fixing a PHP Warning: Invalid argument supplied for foreach() due to glob() sometimes returning false rather than an array.  Plus some refactoring changes to remove duplicate code.

Putting in fix for directly requesting an unfiltered image triggering…

…`checkReferrer()` when it shouldn't

Put in some comments for the new changes.

added NC in the RewriteRule example to make the match case-insensitiv…

…e (it will match JPG for example)

Removing extra line.