Added documentation and generator

Added sbt-site and sbt-ghpages plugins to SBT to generate Pamflet
documentation and upload it to GitHub Pages.

Wrote documentation in Pamflet format (in GitHub Flavored Markdown).
Added MIT License file
Added DSL-like interface for extractors

Added an interface like morph.parser.Interface for extractors.
Removed extraneous settings from build config
Added demo program to extract CVE data