Lots of fixes, lots of linting.

Skipping FontBakery tests on TravisCI for now
Makefile now defaults to help target instead of font
Build script and Makefile fixes
Glyph simplification and composition improvements
Adjust unitsPerEm to 2000, update generate_derived.pe
Added correct foundry identifier (3270)
Renamed base font
Added ⁴, −
Removed slots below 0x1f