Huge rework and numerous bugfixes

- Fixed the semantics API
- Fixed the hooks API
- Added pre-hooks
- Added post-hooks
- Reworked symbol emission and the generated (require) to abbreviate
  generated code to approximatly the density of a human implementation.
- Added some extra awesome to me.arrdem.sad.util for runtime support
huge README update to go with the rework
bump to 0.1.3