EtoileFoundation 0.6

• Introduced iOS 5 and higher support
• Introduced Viewpoints, a collection API to create dynamic views on other collections
• Improved Metamodel for CoreObject and EtoileUI needs
• Added NSMapTable+Etoile
• Removed NSFileManager+NameForTempFile and NSURL+Etoile
• Deprecated ETByteSizeFormatter
• Wrote more missing API documentation