Minor typos in CCphysics classes
Merge pull request #1049 from andykorth/master

Minor typos in CCphysics classes
Bugfixes:
* Loading packages did not take effect before startScene was called on iOS.
* Saving packages on iOS was triggerd in the wrong place. Packages now saved when app enter background.
* Packages default insallation folder now working for mac targets.
CCPackageManager.m added to mac target compile sources build phase.
Package lifecycle events for Android.
Removal of old installData references. Would not compile with log level set to info.
Converting CCPackageManager's installPath to a relative path.
New path behaviour is relative to the caches folder.
CCPackageInstaller working with relative path.
CCPackage's installURL property renamed to reflect relative nature.
CCPackageCocos2dEnabler working with relative paths now.
Merge pull request #1067 from mauiaaron/v3.3

Fix ivar memory management
CCPackageManager working with relative paths now.
Tests fixed.
Merge pull request #1064 from NickyWeber/bugfix/v3.3_packages_saving_and_loading_mac

Bugfixes for packages
Merge branch 'v3.3' into bugfix/package_persistency_ios
Restored serialization key for former installURL of CCPackage. Backwards compatible again.
CCPackage featuring readonly property to get the full install URL.
CCPackage description for debuggin purposes added.
Refactoring for tests: Reusing fixtures and less dependencies to CCPackageHelper to determine caches folder path.
Fixed most warnings for Mac target.
Removed convenience method to download from a custom URL without providing a resolution.
This lead to all kinds of trouble. The resolution has to be set otherwise the default one is chosen risking a package not being installed if the downloaded one differed in resolution.
CCPackageManager new methods to access package of a different resolution and os.