Merge pull request #1 from simonjbeaumont/master

Make into (pathogen-installable-) Vim plugin and tidy up.
Turn on -bin-annot in testbed OMakefile

Signed-off-by: John Else <john.else@citrix.com>
Make sure we only load ocamlspot.vim once

Signed-off-by: John Else <john.else@citrix.com>
Fix typo

Signed-off-by: John Else <john.else@citrix.com>
Add to usage section of README

Signed-off-by: John Else <john.else@citrix.com>