merlin.cfg: Fix typos.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
README.md: Update IMAPPush description.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
(cherry picked from commit c724fba4d8466d6d2b72b511fa7b0b99f38cf74f)
README: Added links to See Also.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
(cherry picked from commit a47b807bd7ee4e029bf7d5725fe1eb1c617e8cb1)
README: Added additional reference to See Also section at the top of the document.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
(cherry picked from commit 4568e6ee5877ffde140a368b51011cba79f11e32)