JNN: Minor enhancements

Extended Spacing and Opacity headers so that it shows the current
spacing and opacity amounts

Replaced UITextView in popover ActorView with UITextField. When you
press enter, automatically calls addActor method instead of always
having to press the button.

Added helper functions for getting the current scene and frame quickly
from teh production.
Fixed Pan Gesture Control and added Pinch and Rotate Gesture Controls

Note to Nicole: (totally unrelated to this commit) You might want to
read my comment in SetPieceListView.m (command+f : "JNN")

A lot of changes in TVGestureController to support the new gesture
controls. In Actor, Note, and SetPiece, there is a new
CGAffineTransform variable called scaleRotationMatrix which stores the
scale and rotation for the pieces.
Simplified Nicole's Code

It was bothering me. So I went ahead and simplified her code.
QuickStageViewController now has one pressPopoverButton method that
handles creating the popover menu. SetPiece are now created using the
image icon in the table view cell rather than from a string. As such we
now have three lines of code versus the amount of
selected<ListItem>Item methods we had previously for each category.
Merge pull request #16 from nang1/JNN-local-branch

Jnn local branch