Impossible to compile something with a ':' in the directory path

e.g.on linux 64:

#!/bin/bash
mkdir 'test:test'
cd 'test:test'
echo -e "module test\nStart = 42" > test.icl
cpm project test create
cpm test.prj

This is due to the fact that cocl takes a pathstring that separates paths with a : on linux (and on mac as well) It is not a problem on windows because : is an illegal character there.

I propose to allow escaping of : to denote a literal :.

This requires an escape for the escape character as well. Say the escape character is \ then a directory called test\:test may pose problems and therefore needs to be written as test\\\:test