[added] basic containers to Common.hpp
[added] StringUtils class to provide static access to functions such as trimWhitespace
[added] test file to example mod
[added] FileTree implementation
[added] FileTree directory parsing
[added] Accessors for FileTree
[added] Directory directory / file parsing
[added] Accessory for Directory
[added] Framework to FileTree for wrapped Path/Directory fetching
[changed] Settings to work with StringUtils instead of class method
[changed] Mod and ModLoader to use new FileTree implementation