add networking helpers to BITAuthenticator

* NSOperation-based networking
* helpers for URLRequest, operation, getPath:error:

Classes/BITAuthenticator_Private.h

@@ -9,6 +9,7 @@
 #import "BITAuthenticator.h"
 #import "BITHockeyBaseManagerPrivate.h"
 #import "BITAuthenticationViewController.h"
+#import "BITHTTPOperation.h" //needed for typedef
 
 @interface BITAuthenticator ()<BITAuthenticationViewControllerDelegate>
 
@@ -46,4 +47,57 @@
 - (void) validationSucceeded;
 - (void) validationFailedWithError:(NSError *) validationError;
 
+
+#pragma mark - Networking helpers (TODO: move to base-class / networking component)
+@property (nonatomic, strong) NSOperationQueue *operationQueue;
+
+/**
+ *	creates an NRURLRequest for the given method and path by using
+ *  the internally stored baseURL.
+ *
+ *	@param	method	the HTTPMethod to check, must not be nil
+ *	@param	path	path to append to baseURL. can be nil in which case "/" is appended
+ *
+ *	@return	an NSMutableURLRequest for further configuration
+ */
+- (NSMutableURLRequest *) requestWithMethod:(NSString*) method
+                                       path:(NSString *) path;
+/**
+ *	Creates an operation for the given NSURLRequest
+ *
+ *	@param	request	the request that should be handled
+ *	@param	completion	completionBlock that is called once the operation finished
+ *
+ *	@return	operation, which can be queued via enqueueHTTPOperation:
+ */
+- (BITHTTPOperation*) operationWithURLRequest:(NSURLRequest*) request
+                                   completion:(BITNetworkCompletionBlock) completion;
+
+/**
+ *	Creates an operation for the given path, and enqueues it
+ *
+ *	@param	path	the request path to check
+ *	@param	completion	completionBlock that is called once the operation finished
+ *
+ */
+- (void) getPath:(NSString*) path
+      completion:(BITNetworkCompletionBlock) completion;
+
+/**
+ *	adds the given operation to the internal queue
+ *
+ *	@param	operation	operation to add
+ */
+- (void) enqeueHTTPOperation:(BITHTTPOperation *) operation;
+
+/**
+ *	cancels the specified operations
+ *
+ *	@param	path	the path which operation should be cancelled. Can be nil to match all
+ *	@param	method	the method which operations to cancel. Can be nil to match all
+ *  @return number of operations cancelled
+ */
+- (NSUInteger) cancelOperationsWithPath:(NSString*) path
+                                 method:(NSString*) method;
+
 @end