Bump twitter.common.python to 0.5.7
Bump twitter.common.python to 0.5.7

(sapling split of 267c956515328307fa273c3f5864ef66f1768f71)
snyaggarwal/pex,rouge8/pex,snyaggarwal/pex,mzdanieltest/pex,jamesbroadhead/pex,jamesbroadhead/pex,rouge8/pex,URXtech/pex,jsirois/pex,kwlzn/pex,pombredanne/pex,sixninetynine/pex,pombredanne/pex,kwlzn/pex,jsirois/pex,mzdanieltest/pex,URXtech/pex,pantsbuild/pex,pantsbuild/pex,sixninetynine/pex