Fix check for claimed disk

We need to use NodeObject.unique_device_for() to get the right device
name when checking claimed disks, and we also need to pass just the
string ("sda"), not the whole disk metadata.
use two-space indentation in template block
move keystone authtoken configuration to cinder.conf

Also removes the api-paste.ini template. Since it's all static, we can
just rely on the vanilla one from upstream.
use @bc_name consistently

Replace "cinder" with @bc_name where it was used to designate the
current barclamp
user/password are already handled by keystone_settings

the new KeystoneHelper should take care of retrieving
service_user/service_password so we don't have to do that here anymore
Merge pull request #175 from vuntz/fix-claim-check

Fix check for claimed disk
Merge pull request #178 from mapleoin/bc_name

use @bc_name consistently
Renamed i18n file, added quotes and copyright
Merge pull request #180 from tboerger/feature/i18n-rename

Renamed i18n file, added quotes and copyright
Moved helper into barclamp namespace
Transformed readme to markdown
Added/Updated gitignore
Merge pull request #181 from tboerger/feature/helper-rename

Moved helper into barclamp namespace
Added application js file to prepare for angularjs controllers
Added/Updated in code documentation to get displayed on upstream documentation section
Merge pull request #176 from mapleoin/keystone_settings

user/password are already handled by keystone_settings
Merge pull request #177 from mapleoin/authtoken

move keystone authtoken configuration to cinder.conf
Merge pull request #182 from tboerger/feature/cleanup

Cleanup backported from rails4 branch
Replaced barclamp controller initializer with before filter
Merge pull request #183 from tboerger/feature/controller-init-replace

Replaced barclamp controller initialzer with before filter