- scale outlines like refence implemention (see scale.txt)
- calculate phantom points like reference implementation (see phantom.txt)
- match execOpcode with explicit and implicit tt specification
- add drop out control to scan line converter
- make the interfaces architectually super clean
- implement hinting for composite glyphs
- extend xfstt for more general use
- increase portability to 64/32/16/8 bit, big/little endianess
- make crash proof for bad fonts
- finish memory allocation not to use mmap or generic new

