It's alive! .recompute()

Added `FreeCAD.ActiveDocument.recompute()`, now the changes actually
show up! The tessellation is garbled, which seems to be because of face
indexes. But it works!

Also set debug mode to on. Should use Winston and decide what to log
permanently. Better more than less.
Ignore test/iofiles/*
.gitignore update
Fixed face indices. Renders beautifully now!

The problem was that new objects started counting from 0 again, so the
face indices of subsequent objects referred to vertices of previous
objects. Fixed this by setting a start vertex number.