Pup-Events-Demo-1.3: dependencies

Dependencies for Pup-Events-Demo-1.3

server	base (>=4 && <5) parsec (>=3.1.1) Pup-Events-Server (>=1.2)
demo	base (>=4 && <5) GLUT OpenGL parsec (>=3.1.1) Pup-Events-Client (>=1.1) Pup-Events-PQueue stm (>=2.2)