README: Fix executable name; Clarify button type ordering

README.md

@@ -31,7 +31,7 @@ The simulator has several configuration options, which you can find [listed here
  You can start multiple simulators with different port numbers to run multiple elevators on a single machine.
  - `--numfloors`: The number of floors 2 to 9), which defaults to 4.
 
-Options passed on the command line (eg. `./sim_server --port 12345`) override the options in the the `simulator.con` config file, which in turn override the defaults baked in to the program. `simulator.con` must exist in the same folder as the executable in order to be loaded.
+Options passed on the command line (eg. `./SimElevatorServer --port 12345`) override the options in the the `simulator.con` config file, which in turn override the defaults baked in to the program. `simulator.con` must exist in the same folder as the executable in order to be loaded.
 
 Options are not case sensitive.
 
@@ -199,6 +199,7 @@ Protocol
     </tbody>
 </table>
 
+Button types (for reading the button and setting the button light) are in the order `0: Hall Up`, `1: Hall Down`, `2: Cab`.
 
 Since interfacing is done over TCP, you can also use command-line utilities to interface with the simulator server. For example, to read the current floor:
 ```bash