Implement lowering 'iso proto <protocol>'
Add example 'iso proto clnp'
Merge pull request #61 from Igalia/low-iso-proto

Implement 'iso proto proto-id'
Add travis-ci support

This provides automatic notifications when a commit breaks the build or tests.
Travis-ci: Added dependency on libpcap-dev
Travis-ci: removed the LUA environment variable.
Merge branch 'master' into examine_allocations

This merge is so this branch can take advantage of travis-ci.