First draft: dump output in new buffer

Does this for all VimHooks. Press ENTER prompt always shows up.
call feedkeys('0') to skip prompt
Allow for vertical split. Use correct buffer name.
Populate VimHook.optional dictionary

Parses each line in the VimHook script itself, searching for comment lines
of the form:

    // vimhook.foo: true
    // vimhook.bar: false
    // vimhook.x: y

In this example the resulting VimHook will have the following properties:

VimHook:
    optional:
        foo: "true"
        bar: "false"
        x: "y"

Note: would like to handle the case where no value is passed. Also would
like to allow the "=" symbol instead of ":"
Allow for ":" or "=". Allow for no values.
Adjust regexp to allow for value-less keys
Coerce option values; VimHook.getOptionValue
Extra comments; change bufferoutput.vsplit key
README: Clean up and cut down on demo text
Set originalBufferName outside of loop
Bug fix for extension-specific VimHook pattern

Forgot to add a $ at the end, so it was matching filenames that just
happened to have 'ext' anywhere in the name, instead of just those which
ended with 'ext'.
Update README