compile for Android, add initial TextInput support

android/CMakeLists.txt

@@ -27,6 +27,8 @@ add_library(
 	src/main/cpp/main.cpp 
 	../engine/pch.cpp
 	../engine/util.cpp
+	../engine/rtt.cpp
+	../engine/bezier.cpp
 	../engine/asset.cpp
 	../engine/image.cpp
 	../engine/texture.cpp

android/src/main/cpp/main.cpp

@@ -54,8 +54,6 @@ struct engine {
     struct saved_state state;
 };
 
-Plane plane;
-
 /**
  * Initialize an EGL context for the current display.
  */