Update README

Author: CrazedProgrammer

README.md

@@ -1,20 +1,40 @@
 # CCBox
 System virtualisation program for ComputerCraft.  
-My entry for CCJam 2017.  
-This program was made with and tested for the [ComputerCraft 1.80 Nightly](https://cc.crzd.me/) builds.
+This was originally my entry for CCJam 2017, but has since been updated.  
+You can find the original code for the CCJam 2017 in the `ccjam-2017` tag.  
+This program was made with and tested for the [ComputerCraft 1.80 Nightly](https://cc.crzd.me/) builds, but could run on older versions too.
 
 # Download
-[pastebin get PheuiSP1 ccbox.lua](https://pastebin.com/PheuiSP1)  
+It is recommended you build this program yourself (see Building), as this download can be outdated.  
+[pastebin get PheuiSP1 ccbox.lua](https://pastebin.com/PheuiSP1)
 
 # How to use
 Get a boot file ([bios.lua](https://github.com/dan200/ComputerCraft/blob/master/src/main/resources/assets/computercraft/lua/bios.lua)):  
 `wget https://raw.githubusercontent.com/dan200/ComputerCraft/master/src/main/resources/assets/computercraft/lua/bios.lua bios.lua`  
 And then simply run `ccbox`.  
 You can exit a VM by running `shutdown`.  
 There are many different options available:  
-  
-![](https://img.crzd.me/ccbox.png)  
-Note that the `tempfs` mount type is currently not implemented due to time constraints.
+```
+usage: ccbox [--help] [--boot BOOT-FILE] [--log LOG-FILE] [--command STARTUP-COMMAND] [--disable-net] [--enable-rs] [--enable-per] [--enable-disk] [--non-advanced] [VFS-MOUNTS...]
+
+ VFS-MOUNTS         The virtual file system mounts.
+  `<attrs>:<mount>:[dir]`
+  attr: attributes. w (write), t (tempfs), c (ccfs)
+  Temp doesn't require a dir argument.
+  mount: mount point (has to start with /)
+  dir: host file system directory
+  Can be relative to the current directory.
+  Default: cw:/:. c:/rom:/rom
+ --help, -h         Show this help message
+ --boot, -b         The boot file. Default: ./bios.lua
+ --log, -l          The log file.
+ --command, -c      The startup command.
+ --disable-net, -n  Disables networking (http, socket).
+ --enable-rs, -R    Enables redstone passthrough.
+ --enable-per, -P   Enables peripheral passthrough.
+ --enable-disk, -D  Enables disk drive passthrough.
+ --non-advanced     Run as a standard (non-advanced) computer.
+```
 
 # Building
 Compiling is done with the [Urn](https://gitlab.com/urn/urn) compiler:  

config.lisp

@@ -11,7 +11,7 @@
                      mount: mount point (has to start with /)
                      dir: host file system directory
                      Can be relative to the current directory.
-                     Default: rw:/:. r:/rom:/rom"
+                     Default: cw:/:. c:/rom:/rom"
             :default '("cw:/:." "c:/rom:/rom"))
 
           (add-argument! spec '("--boot" "-b")