fixes #1676 have memory size use factors of 1024

fixes #1667 - restrcutre fog extensions code

fixes #1656 add support for systems with terabytes of memory

[EC2] Adds retry on host not available, add some useful debugging.

- debugging, to get the whole message
- add backtrace to compute resource failure msg
- add debug logging for Fog errors on create

fixes #1597 - Restrict compute resources access by user

And add some rights to give non admin users so they can perform some normal actions on the hosts they own.

unit/domain_parameter_test.rb self-broke... added a tiny fix.
Removing compute_resources/vms nesting, it is such a nightmare for functional tests....

fixed ui for adding and removing ovirt volumes.
when creating a vm from template, if there was an error in the
form. the vm volumes didnot display correctly.
adding and removing volumes in the same submit action did not function well too.

adds ec2 provisioning support fixes #1223

- added progress bar for instance creation
- minor fixes for certname based deployments
- added ssh provisioning support to orchestartion, which utilize finish
scripts by default
- added images support (part of the vm compute tab)...

fixes #137 - Better support for non-hostname certnames

This patch introduce a new setting :use_uuid_for_certificates which
defaults to false.

users who wish to deploy their hosts using a random unique id, should
enable that setting, and use the certname directive in their puppet.conf...

refs #1589 - Remove hardcoded vmware vsphere_expected_pubkey_hash

Now, users will create a ~/.fog file containing:

=begin
:default:
:vsphere_expected_pubkey_hash: HASH_VALUE
=end

Fog will use this file when contacting vsphere to validate the ssl cert....

fail gracefully if fog is not installed