Fixed windows build
Merge pull request #338 from BugFreeSoftware/fix_windows

Fixed windows build
OTAccount::Credit|Debit should fail on integer overflow
Merge pull request #340 from mhamrle/int_overflow

OTAccount::Credit|Debit should fail on integer overflow
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
Removed unused case OTClient::issueAssetType.
Removed unused case OTClient::sendUserMessage.
Removed unused case OTClient::checkUser.
Merge pull request #334 from benma/ProcessUserCommand

Start removing dead code from OTClient::ProcessUserCommand.
rewrite OTData, new ot_data_t typedef
update OTCrypto to make use of new OTData
update OTASCIIArmor to make use of new OTData
update OTEnvelope to make use of new OTData
update OTSymmetricKey to make use of new OTData
headers updated to make use of new OTData
updated OTAsymmetricKey to make use of new OTData