OTMessage: remove nReturnVal, return at the end of the block
process attribute success in separate method
refactor OTContract::LoadEncodedTextFieldByName
do not use shared pElementExpected in OTMessage::ProcessXMLNode
do not use shared strDepth in OTMessage::ProcessXMLNode
Merge pull request #299 from mhamrle/otmessage_refactor

Refactor OTMessage