Update README.md

Add docs for continue

README.md

@@ -44,6 +44,8 @@ Once inside a debugging session, the following commands may be used:
 
 * `break` - Set break point at the entry point of a function, or at a specific file/line. Example: `break foo.go:13`.
 
+* `continue` - Run until breakpoint or program termination.
+
 * `step` - Single step through program.
 
 * `next` - Step over to next source line.