dsafdwa
Merge branch 'Glut2' of https://github.com/domahony/zx81.git into Glut2
Squashed commit of the following:

commit 072e92b27f8435bab039cc3dfdd9e74646937c29
Author: David O'Mahony <domahony@compusult.net>
Date:   Tue Apr 30 19:42:51 2013 -0230

	Test program to test flag functions

commit 65c1e79aa7f296d2a80d14753b89737b30e852c9
Author: David O'Mahony <domahony@compusult.net>
Date:   Tue Apr 30 18:19:09 2013 -0230

	Merge remote-tracking branch 'zx81/Glut2' into Glut2

commit 301e51f061cfa09774c1cbad9c38e1343cbebe69
Author: David O'Mahony <domahony@compusult.net>
Date:   Tue Apr 30 18:02:01 2013 -0230

	Updated return value when no key is in the buffer