Reattempting to add MySQL client using the Pure Python MySQL client

[ut2496]

This successfully adds the MySQL client for Python 2.6.9 , 2.7 and 3.4.

[ut2496]

@tom-de-smedt @hayd Although Travis CI shows that that job fails for Python 2.7 and Python 3.4 but it successfully installs the MySQL client for both these versions of Python. The job fails due to a Unicode error in Python 3.4. For Python 2.7 it is due to Incorrect Headers in files in the Test folders.
As for Python 2.6, I suggest we remove it entirely as Tempora (a library which is being installed during the python setup.py install --quiet ) does not exist for Python 2.6. Removing Python 2.6.9 will also result in using Pillow 4.0.0 instead of 3.4.2 (Python 2.6 does not support 4.0.0). Kindly suggest further action.