OpenBazaar/OpenBazaar — pull request #672 by Renelvon (2014-09-24 20:46:55+00:00)
Title: Fix executable bit check to work on Mac OS X.

### Motivation:
`find -executable` doesn't work on Mac OS X. See #671.

### Changelog:
* Patch command to work under Mac OS X. FIx #671.
* Ignore results from `virtualenv` folder.