20140402.1701
Merge remote-tracking branch 'SQLConnect/master'
20140402.1908

Added isNull and nullReplace functions.  Added SQLViewController, a UIViewController subclass.

isNull returns YES if the object sent is nil or NSNull, or NO otherwise.
nullReplace takes a test object and a replacement object.  If the test object would return YES to isNull, nullReplace returns the replacement object, otherwise nullReplace returns the first argument.
SQLViewController is a UIViewController subclass and conforms to the SQLConnectionDelegate protocol.  It includes a debugLogging BOOL property.  To use the logging, automatic logging (to the console), subclass, and set debugLogging to YES in viewDidLoad BEFORE calling [super viewDidLoad]