Fixed wrong function call for deleting queue messages in docs
Correct .msg_touch and .msg_release

There's some schizophrenia between the docs and the code. The docs say `.touch` but the code says `.msg_touch` and the docs say `.release` while the code says `.msg_release`. The docs also say `.delete` but the code `.del` as per #8.
Merge pull request #8 from jaredtking/master

Fixed mistake in docs
Merge pull request #10 from chmac/patch-1

Correct .msg_touch and .msg_release