Removed all functions for parsing the debugger command line commands. The core debugger should only support the JSON protocol. Expect these functions to re-appear in d8.

Added processDebugRequest to the debugger which will only process a JSON request. Use that function in the debugger.
Review URL: http://codereview.chromium.org/11395

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@824 ce2b1a6d-e550-0410-aec6-3dcde31c8c00