Query Analyzer: Index suggestions for '2d queries'

Implementation of a simple index suggestion policy for queries that can benefit from a '2d' index.
Merge pull request #85 from jonasz/geo2d

Query Analyzer: Index suggestions for '2d queries'
Added basic getting started message.

Markdown fixes
Added global Airbrake error tracking support.

Airbrake initializer

Added log development option
Merge pull request #86 from kiran-b/master

Fixed ServerStatusObject.new bug
Database Explorer- Provision to create/copy/delete database
Merge pull request #87 from geota/master

Added getting started section to readme.
Merge pull request #80 from jayanth88/master

#72 & #73 - Explorer interface
Fixed README setup information