fieldtrip module: address follow-up bug w/ #1193
calltaker module: new mailables letter template (per #1160 and related email discussions)
calltaker module: front-end changes for new mailables letter format (#1160)
Fix crash with street name beginning with '(' and add related tests
Fix "unbuilt" highways being included for routing
Merge pull request #1196 from goabout/backward_traversal

Backward traversal
Merge pull request #1200 from gcamp/master-fix-street-name-bug

Fix crash with street name beginning with '(' and add related tests
Merge pull request #1201 from gcamp/master-fix-use-of-unbuilt-tag-in-routing

Fix "unbuilt" highways being included for routing
Merge remote-tracking branch 'origin/master' into merge_modules