Added info to error log if db error on the Device::CreateDevice method.  Need to propagate to the rest of the calls for consistency.

#164
Merge branch 'master' of https://github.com/samilliken/openDCIM

Conflicts:
	assets.inc.php

Fixed the error checking on the Device::CreateDevice method to send info to the error log.  Need to do to the rest of PDO calls for consistency.

#164