Add a mapping to open a file in the preview window (Contributed by Ingo Karkat)
Add support for changing the filename format in the MRU window (By Ingo Karkat)
Add new key bindings (By Ingo Karkat)
Mark the MRU buffer as modifiable always
Add syntax highlighting for file names
Updated help text
Add additional mappings and aliases.

Alias <S-CR> for o and <Esc> for q.
Add <C-CR> to open a file as the :only on.e
Issue error when attempting <C-CR> (open :only) on multi-line selection.