Trying out Travis again

I've been using it for work and actually know how to install dependencies.
Merge pull request #24 from drewish/travis

Trying out Travis again
Trying out Travis again

I've been using it for work and actually know how to install dependencies.
Fix dyld: lazy symbol binding failed

Fixes #26
Merge pull request #28 from drewish/use-same-libc++-as-exiv2

Fix dyld: lazy symbol binding failed