- Remove seperate hscommon submodule, and use the files in the dupeguru submodule
- Update package.py and build.py to account for hscommon submodule removal
- Fix one more warning in UI code
- Update .gitignore to ignore visual studio code folder
This was a tricky one because the XIB couldn't be read by a modern
Xcode. I had to go back to 10.8's Xcode to read it properly, save it,
and then read it on 10.12. And even then, there we tons of little weird
values here and there.
This way, once we've built dupeGuru using "make" a first time, we can
work on XCode stuff and build from XCode directly without having to go
through the whole build again.
