BUGFIX: Add config so deltacloud works on ruby 1.8
Fixed missing provider param when editting a provider account
Openstack -> OpenStack string cleanup

We improperly capitalized 'Openstack' in a few places.

Closes https://github.com/aeolusproject/conductor/issues/333
Removes available_providers filter in ProvidersController

This:

a.) Served no constructive purpose. It was ostensibly to allow
 upstream to support everything, but product to only support
 fully-tested providers. Except the file was never changed.

b.) Does not belong in a controller.

c.) Breaks if you send a patch like my 'Openstack' -> 'OpenStack'
 one, unless I were to check for both strings, which would be
 a ridiculous mess.
Merge pull request #352 from n1zyy/no_filter

Removes available_providers filter in ProvidersController
Merge pull request #343 from jguiditta/fix-ruby18

BUGFIX: Add config so deltacloud works on ruby 1.8
Merge pull request #349 from jprovaznik/fixed_account_path

Fixed missing provider param when editting a provider account
Merge pull request #350 from aeolusproject/issue333-openstack

Openstack -> OpenStack string cleanup