Refactored Sample1's EGLDisplay, EGLSurface and EGLContext creations into functions

Author: davidandreoletti

README-Dev

@@ -4,7 +4,6 @@ TODO Priority List:
  - When is the OpenGL buffers associated to EGLSurface deleted ?
  - frameBufferLevel must be 0
  - [self setupVideoFrameIntervalUpdates:0]; -> Sample1[85592:3303] *** -[__EAGLSurface setupVideoFrameIntervalUpdates:]: message sent to deallocated instance 0x8bab670 
- - OpenGL version check compile time check
  - Update Sample1 to recreate EGLContext on EGL_ONTEXT_LOST
  - Memory Leak: App starts with 8.5Mb without EGL. Running the demo consumes more 16Mb. When the demo stops, the memory consumption is higher than 8.5Mb
  - eglMakeCurrent(EGLDisplay dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT)