Server - Add server object (~60h)

[anderserla]

Change server settings in the following way

• Create server service (24h)
  • Create database table
  • Create admin service to get/post/put/delete servers
  • Create public service to get servers
• Add a tab for server customization (2h)
• Make it possible to add servers and what services they've got (wms, wfs, wmts). Store URL:s for each of the different services. (8h)
• Use servers in Layers tab (8h)
  • Replace text field with dropdown of available servers
• Change module settings for Admin and usermap modules (8h)
• Use servers in OpenEMap-WebUserInterface for "Add layer" control (8h)
  • Replace hardcoded server address with dropdown of available servers, and defining default server

Optional (not estimated)

• Possibly rework config to use dynamic server references instead of hard coded URL:s for layers