#723 - Updated wpxmlrpc pod to include NSDateFormatter fix

CocoaLumberjack also got updated with this.  Pointed the Podfile temporarily at the wpxmlrpc repo since Cocoapods Specs take a while for someone to merge the new podspec.
#723 - Updated Pods after wpxmlrpc 0.2 was merged into Specs repo
Merge pull request #724 from wordpress-mobile/issue/723-post-sort-order

#723 - Updated wpxmlrpc pod to include NSDateFormatter fix