Merge pull request #31 from akudev/gh-pages

Add "Follow on Twitter" buttons
Update index.html
Update download.html
Merge pull request #35 from sirion/gh-pages

1.18.12 version update
Added Google Analytics Tracking codes
Added Google Analytics
Added Google Analytics
Added Google Analytics
Added Google Analytics
Added Google Analytics
Added Google Analytics
Added Google Analytics
Added Google Analytics
Added Google Analytics
Anonymize IPs collected by Google Analytics and add disclaimer,
including links to the opt-out plug-in.