Merge pull request #3 from karthik4/extension-dev

Added manifest for GChrome
Create extension infrastructure
Append directory bot/ to obox js file introduced in the initial infra commit #3
[Fixes #1] Adding the bot-human interface
Merge pull request #4 from karthik4/extension-dev

Extension dev
fixes #1
added logo for prototyping
merge changes from the extension branch
fixing typo
Basic tokenization framework
replay tokenization test
Merge branch 'master' into extension-dev

So that master and extension-dev branches show the correct commit history to reflect the changes