Added asset import conflict resolution option to prepend folder name
Cleanups of Project Importer and fixed importing of material and terrain materials, specifically, fallbacks in the event they are unnamed to utilize the mapTo and internalName fields, respectively
Fixed typos in guiTerrainMaterialDlg
Added AssetBrowser button to GuiEditor
Improved FileObject's PeekLine function to be able to peek forward further via an optional lineOffset argument