Introduced a bind on non local variable

With this change, you can adapt a variable to allow
all the apps consuming keepalived to bind on an address
that isn't defined on the system yet (for example if
you don't have the vip because you're backup,  you can
still start your app that binds on the vip).

Please check readme file.

Improved HAproxy example scripts

Additional cosmetic changes also included

License now appears on all files

First release of Keepalived role for ansible. Please read the README …

…file.