Disable indent corrections for 2.0-alpha.9517

With build 2.0-alpha.9517 a string value is not treated as a boolean. Presumably the value should be changed to ‘emptyLines’ but that will enable indent corrections for people using earlier builds, so we are delaying that change.
Add frosted to the list of checkers
PyCheckMate: Add Python 3 support

* Use print function (supported back to Python 2.6)
* Versioned import for urllib.quote / urllib.parse.quote
* Updated except syntax
* Declare a file encoding
* Bump version number
Update comments for pycheckmate

Remove mention of subversion repository, for contributors see 'git log'.

#ignore
Explicitly request TM_ERROR_FD for stack trace/error output
Point to ruby 1.8 shim

Using a shim allows us to catch when 1.8 of ruby is not present and provide other options.

#ignore
Merge textmate/master
Merge remote-tracking branch 'origin/master'