Entitlements code was not tested nor supported upstream since
version 3.0. Remove the associated code.

https://fedorahosted.org/freeipa/ticket/3739

There are too many options in ipa-*-install scripts which makes it
difficult to read. This patch adds subsections to install script
online help and man pages to improve readability. No option has
been changed.

To further improve man pages:

1) All man pages were changed to have the same header and top-center
   title to provide united look.

2) Few typos in man pages have been fixed

https://fedorahosted.org/freeipa/ticket/1687

Adds a plugin, entitle, to register to the entitlement server, consume
entitlements and to count and track them. It is also possible to
import an entitlement certificate (if for example the remote entitlement
server is unaviailable).

This uses the candlepin server from https://fedorahosted.org/candlepin/wiki
for entitlements.

Add a cron job to validate the entitlement status and syslog the results.

tickets 28, 79, 278