Add support for Android 2.3+

There have been plenty of ppl involved in creating this version.
I don't wanna mention names as I'm sure I'd forget someone so I
just tell where help has been done:
- The partial android versions done by various ppl
- Testing on different android devices
- reviewing code (especially the in core changes)
- testing controls
- reviewing texts

A big thank you to everyone helping this to be completed!

src/itemdef.cpp

@@ -38,6 +38,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <map>
 #include <set>
 
+#ifdef __ANDROID__
+#include <GLES/gl.h>
+#endif
+
 /*
 	ItemDefinition
 */
@@ -433,6 +437,11 @@ public:
 				params.light_color.set(1.0, 0.5, 0.5, 0.5);
 				params.light_radius = 1000;
 
+#ifdef __ANDROID__
+				params.camera_position.set(0, -1.0, -1.5);
+				params.camera_position.rotateXZBy(45);
+				params.light_position.set(10, -100, -50);
+#endif
 				cc->inventory_texture =
 					tsrc->generateTextureFromMesh(params);