lang/python3* ports, __pycache__ included

[Kyle Evans]

Hello!

Out of curiosity, is there a specific reason that the lang/python3*
ports all include various __pycache__ bits while these were not
present, at least, in lang/python27?

I ask because this seems to be a decent amount of fat added to the
resulting packages that I'd rather not have in the environments of
some personal applications I am developing, and I don't particularly
see a need that they these directories need to stick around. Space is,
unfortunately, an issue that I worry about. =)

Thanks,

Kyle Evans