bug fixes for Eyelinktoolbox

main bug fixes:

PsychEyelink.c :  
1. 
Eyelink('command' …) crashes if no space is given between % ( for example, %d/%d will crash)
fix:  check % instead of ' ' for actual parameter spec. 

2. limit mouse cursor inside of camera image

EyelinkImageTransfer.c:

Image transfer crashes, due to unallocated memory 

3 SR-Research Demos:

fixes for case sensitive, octave compatible and non integer arguments for Eyelink('command', …) and etc.

Thanks.
Li Jie