Perltidy code
Make sterilize env respond to more ENV variables
Make sterilizing yaml have multiple modes for sterile/non-sterile envs
Force a faster CPAN mirror
Synchronise git subtree maint-travis-ci

Conflicts:
	maint-travis-ci/merge_travis_yml.pl
	maint-travis-ci/sterilize_env.pl
	maint-travis-ci/sync_tree.pl
Update travis conf
Update changes