v0.04

before making some major changes to codegen.c for optimization purposes, and this is a release to preserve the current state.

float/vla support

Float fixes and VLA support. Still lots of bugs

struct/union/bit field implemented

There are probably still some bugs, but I've finished most of what I wanted to implement.

The bulk of the work remaining is bug fixing and optimization.

Provisional release (for float/long testing)

I wrote a minimal float/long library.
Some tests pass.