Provide a before_install to npm link custom deps

Need to use a certain version of sails and of anchor in order for
midas to be testable with travis.
Fix order of directory traversal
Test paths for travis
Correct symbolic links.
Force Travis-CI to use specific versions of sails & anchor

Merge branch 'sprint4-travisbefore' into sprint4

With this commit, travis-ci now checks out anchor and sails
from github (Innovation-Toolkit and balderdashy respectively)
then selects a known good commit.  It links these versions
to the main midas project so that it does not grab those
packages from npm.