haiku: Add Haiku support
Fix broken 'make install'

...that was broken with dc97425bb415422423b8876af0e34111e566d56d (Haiku inclusion)
Windows: Fix cygwin64 build

* Issue reported by Thejus
Windows: Silence VS2013 code analysis warnings

* Also update Windows version report for Windows 10
misc: Fix grammar in a comment

# Closes #41