Adds travis-ci configuration file
Adds travis-ci build image
Merge pull request #49 from turicas/feature/configure-travis-ci

Feature/configure travis ci
Accepting Travis CI
Fix travis-ci configuration file name
Merge remote-tracking branch 'turicas/feature/configure-travis-ci' into develop
Fixes name of ZeroMQ library package (libzmq1)
Merge remote-tracking branch 'turicas/feature/configure-travis-ci' into develop
Fixes sudo apt-get install command. It should consider libzmq3.
Adds message related to libzmq3 use.
Merge pull request #50 from andrebco/fix/libzmq-dependency-version

Fix/libzmq dependency version
Fixes problem with travis-ci environment

OSError exceptions were being raised because of the way travis-ci works.
It's described in: https://github.com/travis-ci/travis-cookbooks/issues/155
Making the correct link to /dev/shm solves the problem.