ansvif 1.7

This release marks easier compiling on most modern operating systems including Windows 7, Windows 10, Linux (Redhat and Debian based distros), and OpenBSD. It may compile/work on other operating systems but has not been tested. This is mostly a source code release with lots of code cleanup, and no new features.

Binaries are attached for Fedora 25, Ubuntu/Debian, and Windows 7 through 10. All are x86_64.