Merge pull request #3 from Fetchnotes/master

Reappearance message and scroll view gesturing bugfix
remove EVERYTHING scroll view, add navigationHandle check
use locationInView to get proper check for gesture being within navigationHandle
fixed some corner cases esp w/ updating previous vc
all pop animations should be on layer not view, do pop animation check on layer not view
separate previousViewController into its own method, hide previous upon push animation complete to avoid overlapped background views
Merge pull request #4 from Fetchnotes/panhandle

[ready] Drag Handle, other such imrovements
add PCStackViewController method shouldPopAnimated: