New Features:
* Regex tag groups
* Tag group inheritance
* Clean input/output folder flag
* Tag in group (/?TIG|) operator for format strings
* Format strings in subfolder names
New Formats:
* Tag group format v1.1
* Adds support for regex tag groups
* Adds support for tag group inheritance
* Schema format v1.1
* Adds support for format string subfolder names
* Adds support for tag in group (/?TIG|) operator
Bugfixes:
* Improved regex handling (warn if malformed regexes in schema, don't throw exceptions)
* Residual '/'s in format strings now cause errors, not warnings, (as they prevent files from being moved/renamed)
* Minor formatting/typo fixes