Update Copyright to 2014, see #3838

Updating the copyright headers:

- [x] Typesafe copyright headers with range 2009-2013
- [ ] Typesafe copyright headers with other ranges or single years
- [ ] Typesafe copyright notices in other files (mostly Licenses)

I was unable to comment on the Assembla ticket, so I am hoping to get some clarification here on the [copyright notice guidelines](https://github.com/akka/akka/blob/master/CONTRIBUTING.md#pull-request-requirements):

Regarding the headers files not presently using 2009-2013, do you want those changed to 2009-2014, or $startYear-2014?

There are some copyright notices in the headers for organizations other than Typesafe (ex. Eligotech BV), are those to be updated as well?