Implement draggable plan and rename library to direct manipulation

Authored by rcameron on Sep 13 2016, 1:57 PM.

Description

Implement draggable plan and rename library to direct manipulation

Summary:
Fix formatting.
Closes #6 (https://github.com/material-motion/material-motion-family-direct-manipulation-swift/issues/6)

remove BlockGesturable.
Closes #7 (https://github.com/material-motion/material-motion-family-direct-manipulation-swift/issues/7)

rename family to DirectManipulationFamily.
Closes #10 (https://github.com/material-motion/material-motion-family-direct-manipulation-swift/issues/10)

Reviewers: featherless, O2 Material Motion, O4 Material Motion Apple platform reviewers

Reviewed By: featherless, O2 Material Motion, O4 Material Motion Apple platform reviewers

Subscribers: featherless

Tags: Material Motion

Differential Revision: http://codereview.cc/D1545