Remove unneeded increment.
Merge branch 'master' of git://github.com/zeckalpha/wren into zeckalpha-master
Fix #6. Handle Ctrl-D in REPL.
Reorganize makefile and scripts.
Fix nasty bug in patching loop exits.
Get rid of separate CODE_SUBCLASS instruction.

Just pushes null to indicate "inherits from Object". Unifies a
bit of code.
Don’t use a specific python instance, use whichever is first in the path.