Loca table filling working partially
loca table prefilled and glyf in base font prefilled with 0xff for now
Merge remote-tracking branch 'upstream/master'

Conflicts:
	build_time/src/base_fonter.py
Added RLE encoding and decoding
Also added unit test for encoding
Preventing FOUT in index.html
Extended FOUT for web font vs incr font page
But, still old backup font is rendered, it is just invisible.
Code changes according to comments
Merge remote-tracking branch 'ahmet-celik/incremental-fonts/master'