White space fixes

Fix OTF lookups

Generate swsh, salt, smcp and c2sc tables.
This commit adds support for swashes, stylistic alternatives, small caps and
conversion from uppercase to small caps

Generate stylistic alternates and fix PostScript names

Create lookups in arbitrary order

Fix compile error

Restructure lookups in gsub table
This commit does also change the order of subtables in the gsub table.
1. Chained substitutions
2. Context for chained substitutions
3. Regular ligatures