- Refactoring classes

- Add Installation Class
- Add AccessToken Class (not yet complete)
- Remove PNObjectProperty
- Move PNObjectProperty methods to "PNObject+Protected.h"

Pod/Classes/PNObjectModel.h

@@ -18,10 +18,19 @@
 
 @interface PNObjectModel : NSObject
 
-@property (nonatomic, assign) id<PNObjectPersistency> _Nonnull persistencyDelegate;
+@property (nonatomic, assign, nonnull) id<PNObjectPersistency> persistencyDelegate;
 
 + (_Nonnull instancetype) sharedInstance;
 
+/**
+ *  <#Description#>
+ *
+ *  @param class <#class description#>
+ *
+ *  @return <#return value description#>
+ */
+- (id _Nonnull) fetchObjectsWithClass:(Class _Nonnull) class;
+
 /**
  *  <#Description#>
  *
@@ -32,6 +41,15 @@
  */
 - (id _Nonnull) saveLocally:(id _Nonnull) object;
 
+/**
+ *  <#Description#>
+ *
+ *  @param object <#object description#>
+ *
+ *  @return <#return value description#>
+ */
+- (id _Nonnull) saveNSUSerDefautls:(id _Nonnull) object;
+
 /**
  *  <#Description#>
  *
@@ -41,6 +59,6 @@
  */
 - (BOOL) removeObjectLocally:(id _Nonnull) object;
 
-- (id _Nonnull) fetchObjectsWithClass:(Class _Nonnull) class;
+
 
 @end