Add udev rule to create /dev/btrfs-control

/dev/btrfs-control is needed or else it will be created after the first
pool creation, though it will fail and have to be retried. This is not really a
bug, but a deployment artifact.
add the pool name as a query parameter to the '#add_share' on pool_detail_layout template.
modify the route in the router to accept and parse query parameters.
pass the pool name to the addShareView constructor during creation and in the view pass it to the template.
Merge pull request #57 from Mchakravartula/issue#20_pool_preselection

add the pool name as a query parameter to the '#add_share' on pool_detai...
Merge pull request #56 from schakrava/issue#18_pool_creation_after_reboot

Issue#18 pool creation after reboot