Version 42: Misc - kill funcs.lua, separate out constants, change WG access

Extensions are now declared in MasterFramework $VERSION/Utils, and pre-loaded before the rest of the framework. These are provided the same global environment as the rest of the framework. string extensions now all have _MasterFramework at the end of their name, while the table extension overrides the Include.table table for the framework, and provides access to the customised version as framework.table. The definition of Include.clear has been moved to Utils/table.lua, and table.joinStrings() has been removed, since it was a slower reimplementation of table.concat()

Constants have been moved out of gui_master_framework.lua into separate files in the Constants/ directory. Subfiles are not automatically loaded to allow for dependencies, other than the entry point Constants/constants.lua.

The main framework files which would have been loaded in previous versions are now contained in the Framework/ directory.

The new major directories are loaded in this order: Utils/, Framework/, then Constants/.

Framework access is no longer provided as WG.MasterFramework[compatabilityVersion], instead as WG["MasterFramework " .. compatabilityVersion]. Removing the intermediate table technically simplifies this?