fullPathForFilename search order changed to go through resolutions first and the search paths.
Packages work with additional search paths. Since packages usually contain only one resolution it may occur that an asset that should be replaced with the asset is found first before the asset is searched. That was the case with the previous search order.
CCFileUtils: Methods added to find paths of a file in all search paths.
Method added to load all filenameLookups in all search paths and merge them.
CCSpriteFrameCache: Method added to load all Sprite sheet lookup files in all search paths and merge them in ivar.
Package classes added.
SSZipArchive added as submodule.
SSZipArchive included in project.
Code re-enabled to compile.
Inline documentation added.
Merge branch 'develop' into feature/Packages

Conflicts:
	cocos2d-ios.xcodeproj/project.pbxproj
	external/ObjectAL
Hint added for unzipping delegate callbacks and threads.
Warnings removed: No newline at end of files.
Partial download resuming more conservative regarding server response.
A server has to explicitly return the Accept-Ranges header with a set value other than none.
CCPackageHelper added to extract currentOS method from CCPackageManager.
currentOS now a class method.
CCPackageDownloadManager will allow to resume paused package downloads when enqueue is used.
A failed package download will start over when used with enqueue.
Compilation error fixed, @class CCPackage added to manager delegate.
Some renaming and comments updated.
CCPackageManager's API changed.
An instance of a package can now be added to the manager to actually get managed without starting the whole installation life cycle.
Leading to a new method to start the download of a CCPackage instance which has already been added before.
The unzip delegate methods will return on the main thread now.
Some refactoring to attach installData with a method instead of code duplication.
CCPackageHelper returning a default value instead of nothing to prevent a crash in the cocos2d-test-ios project.
Hopefully this can be solved to get the platform defines set correctly soon.
First package test added to cocos2d-tests-ios.
Extracted some cocos2d config code in app delegate and made that public to rerun packages tests.
Packages loaded from bundle, no need for an internet connection anymore.
Test packages added to bundle.
Warning removed by reordering NSURLProtocolClient method calls.
Package enabler won't re-add a package if it is already in the search path.