OTLog: -Wunused-private-field
Merge pull request #301 from toxeus/fixClang

OTLog: -Wunused-private-field
Removed duplicate code.
Made a header for mkcert.cpp (cleaning up duplicate declerations).
__TypeStrings: uniquify in opentxs namespace.
Merge pull request #302 from benma/cleanup

Duplicate code, declaration, identifiers
split method processXmlNode
OTMessage: move code to updateContentsByType
split OTMessage::updateContentsByType into small methods
Reformat code from previous commit
reorder methods
Group methods into class