Prevent terminated bosh sessions from sending further requests
Run Dialyzer on Travis
Build just R16B02 on Travis for the moment
Use cached PLTs only on Travis

The PLTs are generated from a Travis-like VM and probably won't work
anywhere else due to paths hardcoded in PLTs.
Show Dialyzer output after test
Treat Dialyzer warnings as errors in Makefile
Fetch Travis PLTs with wget