Add travis CI support to Pezmc/RemoteTech2
Use a passworded zip for the dll's

Not entirely sure where to document the password
Travis should now set the environment variable ZIPPASSWORD which can
then be used to unzip the .dll's

I believe this doesn't work with pull requests, as in theory a pull
request could just dump env to access the password.
Merge branch 'chore/travis' of github.com:Pezmc/RemoteTech into chore/travis