Most basic IO.read invocation works
Merge pull request #517 from jstepien/io-read

Most basic IO.read invocation works
Add short git revision to 'topaz -v'.
Bring subprocess into test file.
Per-method recursion guard.
Untag some specs.
Import subprocess into topaz/main.py
Merge pull request #514 from parkr/topaz-v-git-hash

Add short git revision to 'topaz -v'.
Merge pull request #519 from jerith/jerith/per-method-recursion-guard

Per-method recursion guard
use symbol_w there