Added sanity check for findMatch
Finished most of asset importer logic to utilize settings system
Cleaned up code for finding associated files
Added General importer settings category and integrated logic for those settings fields
Updated logic in variableGroup to support callbacks in custom fields
Updated logic in variableInspector to better handle callbacks, as well as being able to manually update when manipulating fields
Updated scripts to utilize project settings values for playGUI and mainMenuGUI names
Improved module-oriented loading of materials
Added util function for populating custom fonts
This makes some tweaks to the engine to support this, specifically, it tweaks the hardcoded shaderpaths to defer to a pref variable, so none of the shader paths are hardcoded.
Also tweaks how post effects read in texture files, removing a bizzare filepath interpretation choice, where if the file path didn't start with "/" it forcefully appended the script's file path. This made it impossible to have images not in the same dir as the script file defining the post effect.
This was changed and the existing template's post effects tweaked for now to just add "./" to those few paths impacted, as well as the perf vars to support the non-hardcoded shader paths in the engine.
