added demo descriptions

Author: jdupuy

README.md

@@ -8,7 +8,7 @@ I provide two programs: subdivision, and terrain.
 
 ### Subdivision Program
 This program provides a basic example to set-up the CBT and LEB library to compute adaptive longest edge bisections in parallel either on the CPU or GPU. The parallel computations are carried out by OpenMP on the CPU, and GLSL on the GPU. Below is a preview of the program.
-![alt text](assets/preview-subdivision.png "the subdivision program" =500x500)
+![alt text](assets/preview-subdivision.png "the subdivision program")
 
 ### Terrain Program
 This program provides a terrain renderer based on the adaptive longest edge bisection. The terrain geometry is computed and updated in parallel on the GPU using GLSL shaders. Below is a preview of the program.