Fix path for unless statement.

https://github.com/stankevich/puppet-python/issues/46
Add flag to disable wheels for python 2.6

Setuptools 0.8 is required for pip wheel support, Python 2.6 and older only
support setuptools 0.7, we therefor need to disable wheels.
Fix wheel flag for pip commands

Python 2.6 does not support setuptools < 0.8 which is required for pip wheel
support, older versions need to use the --no-use-wheel flag
Fix wheel support and pip version compatability

Fix wheel support and compatability for older pip versions by detecting suppport
when running the pip command inside a virtualenv.
Fix quoting of exec commands to use single quotes
Fix syntax error in conditional statement
Fix handling of wheel support for initial pip
Fix simple typo
Fix bash logic false positives
Further fixes for pip 1.5 and wheel handling
Fix testing for existing virtual environment
Fix grep for detecting if virtenv needs rebuild
Cleanup for merge request
Merge branch 'master' of https://github.com/stankevich/puppet-python

Conflicts:
	manifests/pip.pp
	manifests/virtualenv.pp

Merge curly braces around variable names
Fix wheel/pip1.5 handing with requirements
Fix working dir for virtualenv creation
Merge pull request #49 from jalli/master

Add compatability/support for pip 1.5 and fix erroneous rebuilds