Merge pull request #11 from vladubogdan/develop

iPhone 6 & 6 Plus support + bug fixes
iPhone 6 & 6 Plus Support

There were some problems in the previous revisions that now have been fixed.
Bug fixes

Fixed multi-device support when using old Xcode 5.
Fixed rope joint drawing when cut and joint not child of game world node.
Removed unused files
Fixed an artefact drawing for rope joint

When removing one or both of the connected bodies, rope joints has a small moment when it draws artefacts, because the transformations can no longer be calculated, since the sprites no longer exist. This update fixes that.
Camera zoom, bug fixes and versions update