Update README with instructions and test org mode rendering

Mostly test org mode rendering in forgejo

README.org

@@ -1,3 +1,18 @@
+* svgalib
+
+Latest release (1.9.25), patched so it'll compile on modern GNU/linux distros.
+
+Original Source: https://www.svgalib.org/
+More exactly here: http://my.svgalib.org/svgalib/
+tar ball: http://my.svgalib.org/svgalib/svgalib-1.9.25.tar.gz
+
+*** Compilation instructions
+
+1) Clone repo or download release
+2) *AS ROOT* run: ~# NO_HELPER=y make install~
+
+**** Original description, probably not very relevant
+
 This is an _alpha_ release. Don't use it if you are not interested in
 svgalib development.