Summon API v2 - Support for Index-Enhanced Direct Linking

With the deployment of the Summon API v2.0.0, there will be a new approach to linking for records in the search results. This new approach will simplify the logic in determining which link to use in the Summon API results. The 2.0.0 version will have a new field called "link" which will be the one and only link that is needed for the record. Additionally, to ensure the Summon API remains backwards compatible, the v2.0.0 Summon API will have a new URL to access the service from: http://api.summon.serialssolutions.com/2.0.0