Initial checkin of live departure board code

Work in progress, bulk of code lifted from molly
Added suds as a requirement
Removed unused LDB code

For the time being we can just display the LDB and add the service
information at a later date.
Updated Naptan importer to import Rail platforms

Made it a bit easier to develop with a test harness.
Updated tests with rail importer
LDB provider implements RTI provider interface
Added docs
Refactored accessing the SOAP client

Removed unused "delayed" code
Merge pull request #21 from ox-it/transport-rail

Transport rail