Added readme.txt

Just some general information on the project

readme.txt

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+   ______  __        _             ____       _____   ______   
+ .' ___  |[  |      (_)          .' __ '.    |_   _|.' ____ \  
+/ .'   \_| | |--.   __  _ .--.   | (__) |      | |  | (___ \_| 
+| |        | .-. | [  |[ '/'`\ \ .`____'.  _   | |   _.____`.  
+\ `.___.'\ | | | |  | | | \__/ || (____) || |__' |  | \____) | 
+ `.____ .'[___]|__][___]| ;.__/ `.______.'`.____.'   \______.' 
+                       [__|                                    
+
+A simple JavaScript interpreter for Chip-8. Here is some general information on the platform:
+
+-4k of memory
+-stack with 16 levels
+-64x32 screen resolution (monochrome)
+-16 8-bit data registers (V0 to VF)
+
+My main sources of information for this project are the following URLs:
+
+http://devernay.free.fr/hacks/chip8/C8TECH10.HTM
+http://personals.ac.upc.edu/vmoya/docs/emuprog.pdf
+http://www.emutalk.net/threads/19894-Chip-8
+
+This is a direct port of Jhip8 (https://github.com/miguelduarte42/Jhip8)