shared new release process with Mapzen people

Merge pull request #241 from mapzen/hanb/bump-up-test-device

replaced test iphone device from 5s to 6s (ios7 -> ios9)

Fixed tangramloaded event

• Tangram loaded event was not being fired correctly because of inappropriate scope. fixed it.

set image path manually

• set image path manually for plugins expecint L.Icon.Default.imagePath

Changed npm publish process

Hopefully correcting use of version number in NPM published package.

Upgraded Tangram usage

• Added Tangram event API
• bumped the version of Tangram to v0.9

Added docs tarball to deployment script

release-v0.2.2

Added docs tarball note to changelog for 0.2.2

Testing new deployment process based on tags

release-v0.2.1

Started using CIRCLE_TAG instead of VERSION file