19

- added adjust() to spray paint
- added "test dot" to spray paint
- updated default machine config for recommended size out of the box
(3'x4')
- remember selected drawing style.
Merge branch 'pr/52'

Conflicts:
	java/src/DrawingTool_Pen.java
	java/src/MachineConfiguration.java
	java/src/Makelangelo.java
Changed to java 1.6 generics and some param parsing changes