Added infinite scrolling into the Providers View.
Changed provider chart to have identifiers all the time with the full name displayed on hover. 

Also changed ordering of providers to be by parent_id which causes the root of the OPML import to come to top.
Added rotation to the labels to make it more legible when large numbers on screen
Removed overriding fetch in the provider model due to not being required.
Merge pull request #127 from pophealth/providerPagination

Added infinite scrolling into the Providers View.