Created Officially supported operating systems and versions (markdown)

Officially-supported-operating-systems-and-versions.md

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+# Officially supported
+
+For me »officially supported« means that MKVToolNix should run on these systems without serious limitations. I will investigate and fix bugs on those systems myself.
+
+I will also offer binaries for those systems that I've built myself.
+
+If an operating system or a specific version is not on the list then MKVToolNix might still run on that system or version – but I won't spend time on fixing issues on it.
+
+Why? There are several reasons, but the most important is that supporting systems has a cost in time. My time is limited, as is everyone else's, and this is simply where I draw the line.
+
+Another reason may be that I lack experience developing on such a system (e.g. Mac OS X) or lack an installation of it (again Mac OS X, but also the various BSDs or the Solaris derivatives). Time permitting I may decide to spend time on developing fixes relating to those systems, but I cannot guarantee I will, especially as I lack systems to test those fixes on.
+
+## Windows
+
+Supported are all desktop versions of Windows (meaning Intel architecture) that Microsoft supports. This means Windows Vista or newer, 32bit and 64bit architectures.
+
+## Linux
+
+All versions support 32bit and 64bit architectures except were noted.
+
+- Arch Linux (I don't offer binaries, but this is my main development platform)
+- Debian Wheezy (old stable; needs backports repository for the GUIs), Jessie (current stable)
+- Ubuntu 14.04 »Trusty Tahr«, 14.10 »Utopic Unicorn«, 150.04 »Vivid Vervet«
+- Fedora 20, 21
+- CentOS/RHEL 6 (no GUIs; needs the EPEL repository), 7 (only 64bit; needs the EPEL repository)
+- openSUSE 13.2
+
+## Other systems (Mac OS X, *BSDs, other/older Linuxes, Solaris derivatives etc)
+
+I don't officially support other systems.