updated changelog and publish documentation

Publishing

===

Use `tin` to update the version number in the `package.json`, `component.json` & `bower.json`.

    tin -v x.y.z

Then run the publish script

   ./publish.sh

afterwards don't forget to update the versions to be a prerelease of the next version, so if you just published 1.1.1 then:

    tin -v 1.1.2-alpha

    git add package.json component.json bower.json

    git commit -m 'update version to 1.1.2-alpha'

    git push origin master

 No newline at end of file

Change log

===

- 2.2.0: Documentation fixes and added proj4.defs('name') as an alias for proj4.defs['name'];

- 2.1.4: dist folder is added back in after accidentally omitting it in 2.1.1

- 2.1.3: skipped as issues with the dist folder are ironed out.

- 2.1.2: added sensible defaults for false eastings/northings

- 2.1.1: tweaks to how we publish it, fixes related to errors with the OSGB36 and Reseau National Belge 1972 datums, we took the first steps towards depreciating the proj4.Point class.

- 2.1.0: targeted builds for projections are now supported, and internally projection creation is more modular.