CodeParser returns set<Code>, fix regex overlapping, fix tests and mo…

…ve regex resources to proper path

More logging and safety checks

Refactoring, identifier generation

* Code now has 2 json() methods for converting between JSON and Code
* Deprecate MutableCode#getGson, a new GsonUtil has been created for use in the Code#json methods
* Create IdentifierGenerator class for generating random identifiers

Add proper Code.string() method

New features:

* Add multiple guaranteed regular expressions for each code type => better code scanning
* Code is now an interface; it has a MutableCode implementation
* Now using lombok => CodeBuilder no longer exists

Change how CodeType is translated into String

Remove database codes, add logback

CodeParser new convenience methods and single code parsing method

First stable library release