Adds Apache 2 license file.
Adds Apache 2 license file.

git-svn-id: 34fda4c63642aa536c2e0dabbbb4da5bfd57f8b0@169 5e50eca5-c1b8-4ff5-ab9c-aaa7763a57bf

SHARP-HTP/phenotype-portal,SHARP-HTP/phenotype-portal