replace README with modern notes

Author: kuroneko

README.md

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+# FSD
+
+## History
+
+This repository is derived from the last known public copy of 
+Marty Bochane's FSD 2 source code.
+
+It originated from a zip file 'fsd1110.zip', which bears indications it may
+have come from the FSFDT team.  It is almost identical to contents of the 
+fsd-ubuntu-120413.tar.bz2 distribution still available from the Apollo3
+flight simulator site.
+
+## License
+
+No license was included with the source code, nor copyright claim.
+
+The sources are assumed to be available under the public domain.
+
+Unfortunately, as an Australian, any modifications I make on this code are
+automatically copyrighted, and as such, I release my modifications under
+the Free Public License.
+
+Modifications can be identified by comparing the master branch against
+`original-fsd-2`
+
+### The Free Public License
+
+Permission to use, copy, modify, and/or distribute this software for any 
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH 
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 
+PERFORMANCE OF THIS SOFTWARE.
+
+