Add "Documentation" section to README. Add link to Sami.
Merge pull request #442 from bantu/readme-documentation-section

Add "Documentation" section to README. Add link to Sami.

* bantu/readme-documentation-section:
  Add "Documentation" section to README. Add link to Sami.
Merge branch 'master' into php5

* master:
  Add "Documentation" section to README. Add link to Sami.

Conflicts:
	README.md