Travis CI updates:

* Run autobahn/valgrind tests when target branch in {master, develop}
* Add coveralls
* Show full stacktrace for usan (RIPD-1150)
* Manual launch of coverage (RIPD-1152)
* Use lldb on Darwin (RIPD-1152)
* Set defaults if not CI (RIPD-1152)
* Add autobahn result parser (RIPD-1147)

scripts/run-with-debugger.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -eu
+
+if [[ $(uname) == "Darwin" ]]; then
+  # -o runs after loading the binary
+  # -k runs after any crash
+  # We use a ghetto appromixation of --return-child-result, exiting with
+  # 1 on a crash
+  lldb --batch \
+       -o 'run' \
+       -k 'thread backtrace all' \
+       -k 'script import os; os._exit(1)' \
+       $@
+else
+  gdb --silent \
+      --batch \
+      --return-child-result \
+      -ex="set print thread-events off" \
+      -ex=run \
+      -ex="thread apply all bt full" \
+      --args $@
+fi