Tests in Python 2.6 environment

[gulbinas]

Does somebody uses mongokit with python 2.6?
Now tests works only with python 2.7, I don't have env to test them properly, so for now travis build only do test against python 2.7

Regarding python 2.6 patch are always welcomed.

[eneepo]

I think it would be better to focus more on 3 and 2.7, let's forget 2.6 like it didin't exist at all!
Further more if anyone is using arch linux, it can't be easier than typing yaourt -S python26 in terminal to have python 2.6. You can also install python 1.6 as easy as that if anyone was interested ;)