Drop Python 3.3 support

[adtac]

Closes #35

[sils]

please also remove the circleci conf, just grep for 3.3

[adtac]

@sils1297 done 👍

[adtac]

Lol, wrong fixes message ID. Fixed 👍

[sils]

ack 2f76455

[sils]

was there any other CI here?

[adtac]

Nope, just circle. There's an issue to add Appveyor later, but for now, that's it.

[sils]

@rultor merge

[sils]

changing circle from 3 to 2 builds then to increase parallelization

[rultor]

@rultor merge

@sils1297 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@sils1297 Done! FYI, the full log is here (took me 1min)