Merge pull request #2 from kennethreitz/master

Pulling in the latest changes at origin.
Suggest improved introduction to Style/#Idioms

My reading, though limited, suggests that the general notion of Idioms
is used often, but rarely explained. It feels very alien to beginners. A
term like "Idiomatic Python" can cause mental stack overflow. It did to
me :) So I humbly submit, in this case, explicit is better than
implicit. I debated whether to place it at the top of the document,
where idioms are first mentioned, but placed it here instead, as this
section explicitly references the topic of idioms.
Merge pull request #243 from lambdadi/master

Suggest improved introduction to Style/#Idioms