Make request instance to select CachePolicy.

[huntrax11]

First of all I wanna thank you for sharing this great request library- In your EGOHTTPRequest method called "- (NSURLRequest_)buildURLRequest" There are code like above that declare CachePolicy. NSMutableURLRequest request = [[NSMutableURLRequest alloc] initWithURL:self.url cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:self.timeoutInterval]; Some times I need to specify cache policy on request when User want to update manually and blah blah blah. Would you like to make a fix on that?