Add licenses to all the things

case/mac.scad

@@ -1,3 +1,12 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain 
+ * this notice you can do whatever you want with this stuff. If we meet some day, 
+ * and you think this stuff is worth it, you can buy me a beer in return. 
+ * ----------------------------------------------------------------------------
+ */
+
 //All measurements in mm
 
 $fa=8; //segments/360 degrees

case/mouse.scad

@@ -1,3 +1,12 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain 
+ * this notice you can do whatever you want with this stuff. If we meet some day, 
+ * and you think this stuff is worth it, you can buy me a beer in return. 
+ * ----------------------------------------------------------------------------
+ */
+
 $fa=8; //segments/360 degrees
 $fs=0.1; //min size of fragment
 $fn=32; //override amount of facets

pcb/license.txt

@@ -0,0 +1,9 @@
+This PCB artwork is licensed under the Beer-Ware license:
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain 
+ * this notice you can do whatever you want with this stuff. If we meet some day, 
+ * and you think this stuff is worth it, you can buy me a beer in return. 
+ * ----------------------------------------------------------------------------
+ */