Pinned swig to 0.14.0 because of breaking change in swig

Only a couple of hours ago paularmstrong released a new version of swig, one that no longer have init(). This causes airfield to fail. Pinning swig to 0.14.0 in the package.json prevents this error from happening.

See
https://github.com/paularmstrong/swig/releases
Merge branch 'patch-1' of https://github.com/dhrp/airfield into dhrp-patch-1

Conflicts:
	package.json