Add license headers based on git history.

The original author is listed as first entry in the copyright and others
and contributors are listed after the license. This is the standard form
used in eclipse.org codebases.

Change-Id: I41d1404d594e8b48e7b44399f6125f528b2b0a7c
Merge pull request #58 from akurtakov/development

Add license headers based on git history.