Fix build and installation on cygwin
Partial fix for #163
remove incorrect installation directories
fix mistake in previous commit
Fix #172 - On Mono #I paths don't work for assembly references
Merge branch 'master' of https://github.com/ovatsus/fsharp into ovatsus-master

Conflicts:
	.gitattributes
Merge branch 'master' of https://github.com/fsharp/fsharp