Made the input/output file type for geo.py more clearer.

README.md

@@ -7,11 +7,11 @@ Contains the Geo class, which represents the contents of .geo files. Can be run
 
 geo.py <infile.geo> [<outfile.geo>]
 
-If only an input file is specified, it will read the input and dump the contents of the .geo to the console.
+If only an input .geo file is specified, it will read the input and dump the contents of the .geo to the console.
 
-If an output file is specified, it will read the input file, and write the contents to the output as a new .geo file.
+If an output .geo file is specified, it will read the input .geo file, and write the contents to the output as a new .geo file.
 
-## stl_dump
+## stl_dump.py
 Dumps the meshes of a .geo file to .stl files. Used for testing and validation, as .stl isn't useful for games.
 
 stl_dump.py <file.geo>