Pushed latest PythonTidy changes and new beautify code that optionally uses tidy.
To enable, change "if 0" to "if 1" in prettyPrintNode.

Leo build: 20141010091000
Merge branch 'master' of https://github.com/leo-editor/leo-editor

Conflicts:
	leo/core/commit_timestamp.json

Leo build: 20141010091422