feat(Util): errormsg function

A wrapper to error, but with better stack tracing
when printing.

Util/errormsg.m

@@ -0,0 +1,43 @@
+function errormsg(msg,varargin)
+% function errormsg(msg,varargin)
+%
+% A Wrapper to error, but showing where
+% the error ocurred.
+%
+% Inputs:
+%
+% msg - A message string.
+% varargin - sprintf/further arguments (e.g.fields for msg).
+%
+%
+% Example:
+%
+% %basic usage
+%
+%
+% author: hugo.oliveira@utas.edu.au
+%
+cstack = dbstack;
+if numel(cstack) == 1
+	name = cstack.name;
+	stack = cstack.stack;
+else
+	name = cstack(2).name;
+	stack = cstack(2:end);
+end
+
+actualmsg = sprintf(msg,varargin{:});
+dotsplit = split(name,'.');
+if numel(dotsplit) == 1
+	name_as_id = sprintf('%s:%s',dotsplit{1},dotsplit{1});
+else
+	id_msg = repmat('%s:',1,numel(dotsplit));
+	id_msg = id_msg(1:end-1);
+	name_as_id = sprintf(id_msg,dotsplit{:});
+end
+actual_exception = MException(name_as_id,actualmsg);
+try
+	actual_exception.none
+catch me
+	throwAsCaller(actual_exception)
+end