Updated README for TP2.

Change-Id: I1a2c3248a78748cebd6117094f6440b900f96068
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>
Reviewed-by: Sami Makkonen <sami.makkonen@digia.com>
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>

README

 ---------------------------------------
-Qt Canvas 3D 1.0.0 Technology Preview 1
+Qt Canvas 3D 1.0.0 Technology Preview 2
 ---------------------------------------
 
 Qt Canvas 3D 1.0 module provides a QtQuick canvas component that can be used to render
-with WebGL-like API from QtQuick JavaScript environment
+with WebGL-like API from QtQuick JavaScript.
 
 
 System Requirements
@@ -92,3 +92,15 @@ Known Issues
     void vertexAttrib3fva(uint indx, QVariantList values)
     void vertexAttrib4fva(uint indx, QVariantList values)
 
+Fixed from Technology Preview 1
+===============================
+- All Canvas3D C++ classes have now been put to namespace to avoid clashes.
+- Qt Creator wizard templates have been implemented and added.
+- Crash when giving null pointer to texImage2D fixed.
+- Antialiasing now works. It was broken due to quick fixes done to avoid crashing
+  with dynamic OpenGL implementation loading in Qt 5.4.
+- Frame submit order was mixed when antialiasing was turned on causing animations
+  to appear juddering.
+- checkAllErrors flag now means doing glGetError after each OpenGL API call,
+  this causes negative performance impact, but now all issues related to invalid
+  API use are printed to log.