use constant fmt string when printing error in OTPseudonym
disable check -Wformat-nonliteral

This is only workaround. Creating bug for this.
Merge pull request #341 from mhamrle/error_fmt

use constant fmt string when printing error in OTPseudonym
CMake: enable format warnings also for clang
Merge pull request #343 from toxeus/formatClang

CMake: enable format warnings also for clang
opentxs CLI command separation.
Split into one class per command/function.
Removed unused parameters/functions
Fixed missing default case values
Replaced weird '\32' character with space in all files
Fixed formatting in OT_ME.cpp