Merge pull request #1 from jasonray/patch-1
ENH: Added copyright headers to source files.
Added header to source files containing the copyright notice and
short statement about the license.
ENH: Visual Basic source files from OpenAHLTA.
Committed source code files in their original form.
ENH: Add LICENSE and NOTICE files.
These two files clarify who hold the copyright of the source code, and
the terms under which this software project is licensed.