Add description and data-file for HSC file format (#9)

Add description and data-file for HSC file format

_library_formats/HSC.html

@@ -0,0 +1,20 @@
+---
+filename: HSC.zip
+flags: "A DEPM "
+extension: .HSC
+desc: HSC - Hannes Seifert Compositioni (?)
+---
+<p>This format originates with developer Hannes Seifert while he worked at Neo
+Software Productions GmbH. The player has been decompiled and reworked
+multiple times by various groups, so there exists multiple trackers and playback
+engines with various inheritance.</p>
+
+<p>
+<a href="https://en.wikipedia.org/wiki/Rockstar_Vienna">Wikipedia Rockstar Vienna (former Neo Software Produktions GmbH)</a><br />
+<a href="https://github.com/libxmp/libxmp/blob/master/docs/formats/hsc.txt">libxmp writeup on hsc</a><br />
+<a href="http://www.vgmpf.com/Wiki/index.php?title=HSC">vgmpf.com HSC</a><br />
+<a href="https://modland.com/pub/modules/Ad%20Lib/HSC%20AdLib%20Composer/">modland.com music archive</a><br />
+<a href="https://modland.com/pub/software/trackers/DOS/HSC-Tracker/">modland.com tracker archive</a><br />
+<a href="https://modland.com/pub/software/players/DOS/Grafik%20HSC%20Player/">modland.com player archive #1</a><br />1
+<a href="https://modland.com/pub/software/players/DOS/HSC%20Module%20Player/">modland.com player archive #2</a><br />
+</p>