Set main window frame to auto save frame so that it will be restored on next run (in XIB file), Refactored pressedPanelVisibility: so that it would calculate and set the central panel frame once instead of twice during a call to the method, Also modified pressedPanelVisibility: so that it would always set the bottom panel visibility based on segment control, Used the modified pressedPanelVisibility: method to save panel states and to restore it on app start
Set main window central pane to remember splitter position across application restarts (via XIB file)
Save last open project info on SpriteBuilder termination and re-open project when next launched
Merge pull request #484 from jtwigg/develop

Fix premultiplied alpha settings.
Gitignore file for default projects added. Script adjusted to include it in generated archive files.
Creation of generated files moved to separate script.
Generated files can now be created without building the whole project as a product.
It's not that obvious how to override an image for a specific scale.
Image and some extra text added.
SnapLayer Fixes
Ruler Color Restored
SnapLayer Visibility Improvements
Refactored line addition so can unify node transforms (needs more work for depth N)
Tided up integration into CocosScene
Merge pull request #487 from NickyWeber/feature/doc_update_override_image_scale

It's not that obvious how to override an image for a specific scale.
Merge pull request #494 from cocojoe/develop

SnapLayer Fixes
Merge pull request #486 from NickyWeber/feature/#482_add_gitignore_default_projects

Feature/#482 add gitignore default projects
Merge pull request #499 from jtwigg/develop

Support new compression algo for Int's.
Main window position saved, as well as the split views.
Split views: left panel first and second tab, and center panel between stage and timeline.
Preview view resized to fit upper split views view.
Storing and restoring of visible panels added. Thanks to FahimF.
Minor refactorings for readability.
Refactoring: Replaced string literals with constants for window state save and restore.
Registering userdefaults for window state.
Refactoring: Moved panel visibility code to MainWindow class.
MainWindow object added to MainMenu.xib referencing the AppDelegate's instance.
Rewired segmented control and panels to MainWindow instance in xib.
Code needed for debugging removed.
Bugfix: Modal sheets were malfunctioning.