No default region.
Use config options consistent with aws-sdk.
Merge pull request #58 from mapbox/aws-config

Remove default region and rename AWS cred options
0.7.0
Add failing test.
Pass nest object to resolveFeatures.
Refactor of tests.
Merge pull request #70 from mapbox/fix-list

Fix list()
v0.7.1
Merge pull request #71 from mapbox/issue69

Refactor of tests.
Merge branch 'master' into issue67

Conflicts:
	test/index.js
Add test of line on the equator.