Tweak travis IRC notifs
Add Python 2.7 trove classifier to setup.py
Shuffle gateway logic around for improved reconnecting.

Fixes #957
Changelog re #957
Merge branch '1.5' into 1.6

Conflicts:
	docs/changelog.rst
Travis no longer supports Python 2.5

Now I'm EVEN MORE glad my default dev venv is 2.5 based...
Merge branch '1.5' into 1.6
Fix bug where _pty_size() returns unreasonable rows/cols in Emacs
Changelog re #956, fixes #956
Merge branch '1.5' into 1.6
Cut 1.5.5
Merge branch '1.5' into 1.6

Conflicts:
	fabric/version.py
Cut 1.6.4