Merge pull request #117 from murrekatt/develop

Cleanup and structure improvements of OTAccount.
Fixed bug with operator!= for OTData.
Cleanup and structure improvements for OTData.
Removed include of OTCleanup.hpp in OTData.
Removed unnecessary logging and corrected includes accordingly.
Corrected include and namespace for C++ code.
Added missing include and cleaned up function call.
Removed unnecessary this->
Minor cleanup of OTData.
Adjusted includes.