Make sure virtualenv picks up Python 2.7

[zombietango]

Just so others don't waste a day or so on this like I did - make sure that virtualenv is picking up your Python 2.7 environment and not your 3.X one. I'm setting this up on a system running macOS and that has multiple Python environments. Base 'virtualenv metta' was pulling my Brew installed Python 3.6 environment while it seems Metta either requires 2.7 or just doesn't like my 3.6 build.

Running:

virtualenv --python=<path to preferred python> metta

fixed the issue.

Recommendation - Make note in setup/README that Metta requires Python 2.7 (if this is indeed the case) or make note that if you are getting import errors on workers.vagranttasks or BaseConfig (which is where my problems were) you should declare a different Python environment when creating the virtualenv.

[carnal0wnage]

sorry for the confusion. I've updated the setup doc. If this doesnt resolve it for others (in your opinion) please open another issue.

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