Made Load DefaultSourceDir mutable via := for fixing on install.
Made Load DefaultSourceDir mutable via := for fixing on install.

briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language,briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language,briantrice/slate-language,briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language,briantrice/slate-language,briantrice/slate-language