I ported the combinators egg to chicken 5

[Alaric Snell-Pym]

Hi there Kon,

As I was porting something that needed it, I did a quick port of the 
combinators egg to C5... I did it with cond-expand so the same codebase 
works for C4 and C5 rather than making a new fork.

Please find it attached - if you like it it's all yours, and I'll gladly 
add it to the C5 egg list if you wish :-)

Thanks for the eggs,

Alaric

combinators-c5.patch
Description: Text Data

combinators.egg
Description: Text document