Enable build under planex

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

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

Signed-off-by: John Else <john.else@citrix.com>
Simplify a bash conditional

Signed-off-by: John Else <john.else@citrix.com>
Don't restart the rrdd plugins on install/upgrade

The build process tries to start the plugins which makes no sense, plus
we don't do this for any of our other daemons.

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #4 from johnelse/planexify

Planexify