VMware Infrastructure Perl Toolkit Code

Reverting the documentation to the alpha version. Too many issues to consider at this point to try to upgrade the external documentation prior to the release.

Deleting installation guide that includes information about the Appliance.

corrected links to doc.

Simplify the check for required -- 0 and undef both correspond to not
required, so we can do a straight boolean check.

Building on the last fix (to handle undef parameters), simplify the
parameter-passing logic for vmregister.pl.

If a method parameter is set to undef, ignore it rather than failing.
Checking in on behalf of Shivraj, who doesn't have his SF/svn account
set up yet.

Remove obsolete help messages.

A fresh coat of paint for the VM samples: move them all forward to
VILib, plus a couple additions/refinements:

vmregister.pl:
-- Split out unregister into vmunregister.pl, since its arguments are
sufficiently different that it makes sense to separate the two.
-- Fix a bug the handling of host and pool views.

vmprovision.pl:
-- Add support for creating multiple identical VMs in a single create
call.
-- Add support for relocate in addition to clone and create.

Thanks to Steven Kusalo, who did most of the heavy lifting for the
vmprovision.pl changes.

I or'd when I should have ||'d....

Batch of fixes:

VILib:
-- Baby steps towards better error handling: catch a couple common
failures in Util::connect
-- Change --host to --server, so --host is available for HostSystem-ish
things
-- Clean up variable usage info a bit
-- Disable reading username/password from stdin, since it's currently
broken and needs a bit of rethinking anyway
-- Enable Opts::validate() to take user-defined validation methods

VIM2Runtime:
-- If the user passes an empty list of morefs to get_views, return an
empty list of views instead of dying

Samples:
-- Move a bunch more over to VILib; all that's left now is samples/vm/...
-- Fix error message in datacenterlisting.pl