Always move VoiceOver focus to the current view

Without this, VoiceOver user has to touch-explore to get to the left and right
views. And when top view is restored, they might end up in "nowhere" with
VoiceOver. So post notification to VoiceOver that screen has changed so that
it can reread it and focus the right element.
Add pan gesture if shouldAddPanGestureRecognizerToTopViewSnapshot
Simplify shouldAddPanGestureRecognizerToTopViewSnapshot
Merge pull request #127 from dusek/accessibility

Always move VoiceOver focus to the current view
make anchor-to-left panning behaviour consistent with anchor-to-right behaviour

now the sliding view will tend to reset unless the velocity is great enough in the proper direction
reword documentation for panningVelocityXThreshold
Fixes #57. Get corrected bounds when rotated
Fixes #126. Calling slidingViewController category from modal
Merge pull request #186 from DanLite/x-velocity

Do proper x velocity comparison when pan ends
Add new accessibility features to README
Version bump
Fixes #128. Ensure end animations states are set

The animation can be stopped in the middle by a rotation. This ensures
that the ending state of the animation is set.
do not check if panning past anchor if anchorLeft/RightTopViewCenter is not set
Merge pull request #187 from DanLite/no-pan-single-under-view

Do not check if panning past anchor unless anchorLeft/RightTopViewCenter is set
prevent top view resetting when dragged past anchor
Merge pull request #188 from DanLite/past-anchor-reset-fix

Prevent top view resetting when dragged past anchor
Update ECSlidingViewController.m

Fixed lame bug with parent view controller finding
Find the right slidingViewController from a chain of modals
Version bump
Merge branch 'master' into ios7

Conflicts:
	ECSlidingViewController/Vendor/ECSlidingViewController/ECSlidingViewController.m