Demo5 code

• Dots.C
• Dots.h
• Errors.C
• Errors.h
• Makefile
• UI.C
• UI.h
• fragment.glsl
• main.C
• vertex.glsl

Changes

• Error code seperated out into a file.
• This uses a single buffer containing data that has been intermixed
  • 2 floats for the location of the dots.
  • 3 floats for the color of each dot.
  • 1 float for the size of each dot.
  • The program queries for the location of each associated attribute