Fixes from #235 - Githubissues

This is all the fixes from #235 without the FUSE code. Fixes:

236
230
Probably fixes #229. User was following old build instructions which are now fixed.
Potentially fixed #228 as much of the code that seemed to be causing the issue has been re-worked, but confirmation is needed.
215
214 (This might have been fixed previously)
162 was probably fixed previously, but still had some occasional issue and should now be fully fixed. (also #142)
157 Other issues he mentioned were already fixed, but now file extensions are not case sensitive.

Additionally #240 was fixed with #243 and can be closed.

probonopd / go-appimage