Update README.md

README.md

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 # OpenXION Syntax Dictionary
 
 Syntax dictionary for the xTalk script dialect OpenXION
+
+# Command line options for XION:
+Usage: xion [options] [--] [programfile] [programfile] [...]
+  -c statement        execute the specified statements
+  -D var=value        set the value of a global variable
+  -E encoding         specify the text encoding used to read script files
+  -e expression       evaluate and print the specified expression
+  -f programfile      execute the specified script file
+  -h, --help          print help screen
+  -i                  start an interactive shell
+  -M programfile      generate a message file for localization
+  -m classname        load an XNModule with the specified class name
+  -P                  use fancy prompts simulating dialog boxes (default)
+  -p                  use simple, more traditional prompts
+  -R                  clear runtime state AND unload all modules
+  -r                  clear runtime state ONLY
+  -S                  print a stack trace for every exception
+  -s allow|ask|deny   set security settings to allow|ask|deny every request
+  -s key=value        set security setting for one kind of request only
+  -s file             read security settings from file as key=value pairs
+  -T                  instead of printing output, print file name and
+                      diff of output against .out file (testing mode)
+                      (-s allow recommended with this option)
+  -V                  import environment variables as XION globals
+  -v, --version       print OpenXION, Java, and OS version numbers
+  -W                  import CGI environment variables as XION globals
+  --                  treat remaining arguments as file names