Hardening/431 tenants made lowercase

### Description
o Tenant names changed to all lowercase upon reception of a request
o Two bugs on buffer length fixed (thanks to the new compiler on Ubuntu 13.10)
o Better check on proxyCoap running in harnessFunctions.sh
o testHarness.sh no longer hangs on 'ERROR 11'
o Added descriptive texts to the errors in testHarness.sh
o Commented out one more LM_T right before call to MHD_start_daemon
o make test now uses DEBUG compilation of broker

This PR fixes issue #431
Information about Ubuntu shouldn't be under the "CentOS 6.3 (official)" section in the README.md. There should be "Unbuntu (unofficial)" section about that, the same way we currently have the "Debian 7 (unofficial)" section.

However, my comment about this at skype was to put this information in the #11 issue, not in the README.md. Upon resolution on #11 we will provide a complete "Unbuntu (unofficial)" section.