implement renderer class to draw points
add new customized GLSurfaceView
resolved conflicts when merging with master
organised import in GLES20SurfaceView.java
reimplement GLES20Renderer.java
Merge branch 'master' into add-opengles-framework
tutorial renderer for opengGLES 20
a working GLES20Renderer
add an additional call to onCreate in onSurfaceChanged in GLRenderer.java
reimplement GLES20Renderer.java, working version
Merge branch 'add-opengles-framework'