Added query processing algos

Algorithms/Sources.md

@@ -366,9 +366,9 @@ We have lots of links to add here...it will be updated soon!
  - [Article](http://neohumanism.org/l/la/lagged_fibonacci_generator.html)
  - [Video](https://www.youtube.com/watch?feature=player_embedded&v=qdmH6slZ0ac)
 
-### Query Processing
+### Trees
 
-* 
+* Andersson Tree
  - [Article](http://eternallyconfuzzled.com/tuts/datastructures/jsw_tut_andersson.aspx)
 
 * AVL Tree
@@ -409,7 +409,7 @@ We have lots of links to add here...it will be updated soon!
  - [Article](http://www.geeksforgeeks.org/tournament-tree-and-binary-heap/)
  - [Video](https://www.youtube.com/watch?v=H7rvz_WdV3U)
 
-### Trees
+### Query Processing
 
 * Fenwick trees
  - [Article](https://www.topcoder.com/community/data-science/data-science-tutorials/binary-indexed-trees/)

C_plus_plus/resources.md

@@ -264,6 +264,7 @@ A curated list of C++ frameworks, libraries, resources, and shiny things.
 * [Panda3D](http://www.panda3d.org/) - A framework for 3D rendering and game development for Python and C++. [BSD]
 * [Skia](https://github.com/google/skia) - A complete 2D graphic library for drawing Text, Geometries, and Images. [BSD] [webpage](https://sites.google.com/site/skiadocs/home)
 * [urho3d](https://github.com/urho3d/Urho3D) - Cross-platform rendering and game engine. [Many different, mostly MIT]
+* [OpenGL](https://www.opengl.org/) :zap:
 
 ## Image Processing