HOTFIX: Reset the initial paramaters on LK

When performing a single fitting of LK, we weren't resetting the
parameters. Luckily, this is a simple fix.
another bunch of docs fixes
lots of transform doc improvements
Merge pull request #349 from jabooth/moredocs

Transform documentation
HOTFIX: Landmark setting with pointclouds is broken!

Accidentally broke the setter for PointClouds! This is now
fixed and a test is added to check for it
Merge pull request #350 from patricksnape/master

HOTFIX: Landmark setting with pointclouds is broken!
Merge branch 'master' into lk_hotfix
Extends the hotfix to CLMs and parametric-based SDMs
Merge pull request #348 from patricksnape/lk_hotfix

HOTFIX: Reset the initial paramaters on LK
Merge remote-tracking branch 'upstream/master' into copy

Conflicts:
	menpo/landmark/base.py
	menpo/landmark/test/landmark_test.py