Adds selenium tools for project creation and data dictionary loading

[pbchase]

This pull request is preliminary step towards testing plugins with Selenium.

Adds

• Add a Change Log compliant with http://keepachangelog.com/
• Add selenium scratch files to .gitignore
• Add ./scripts/ folder and scripts to create a project and load a data dictionary
• Add documentation on selenium prerequisites and project creation scripts
• Add url-rewriting plugin in ./plugins
• Add the BSD license text to the ./vagrant folder

Changes

• Vagrant VM now links ./plugins/ and ./hooks/ into REDCap's default location