Adds Atari 5200 info to the README.

Author: dmsc

README.md

@@ -1,7 +1,8 @@
 FastBasic - Fast BASIC interpreter for the Atari 8-bit computers
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-This is a fast interpreter for the BASIC language on the Atari 8-bit computers.
+This is a fast interpreter for the BASIC language on the Atari 8-bit computers
+and the Atari 5200 console.
 
 The current features are:
 - Support for Atari floating point and 16bit integer variables;