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
Bump the version
New api call: getImageMeta() - returns the following image
properties (which are technically not tags):

    { fileName: '/path/books.jpg',
      fileSize: '993738',
      mimeType: 'image/jpeg',
      pixelHeight: '1200',
      pixelWidth: '1600' }

Exiv2 also outputs these by default, along with the high level summary
exif tags.