Add a README file

README

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+yaglitch : Yet Another Glitch implementation
+============================================
+
+From an original idead from https://github.com/erlehmann/libglitch
+
+Glitch file format is documented in FORMAT-draft-erlehmann copied from the
+repo above.
+
+Compiling :
+===========
+
+Needs : nasm, GNU ld, GNU make
+-------
+Depends : on SDL (1 or 2) headers (libsdl1.2-dev or libsdl2-dev on Debian)
+---------
+
+To compile for SDL1 use : 
+
+$ make
+	or
+$ SDL=1 make
+
+To compile for SDL2 use :
+
+$ SDL=2 make
+
+Then you can run yaglitch : 
+
+$ ./yaglitch # to get some help
+$ ./yaglitch zered1.glitch # to run a test glitch
+
+Other songs examples :
+======================
+
+You can find various example song on
+https://github.com/erlehmann/libglitch/tree/master/tracks
+
+But it is better to write your own ;o)
+
+Note that the python implementation from erlehmann has a fancy GUI to edit
+your song live !