Minor fixes.

• Removed the busy cursor that occurs when loading.
• Added support for IE7 to IE9. (#3, @markbao)
• Implement trickleRate and trickleSpeed options.
• #5 - Implement the showSpinner option to allow removing the spinner. (#9, @rahulcs)
• Registered as a Component in Component.io.
• #8 - Updated the Readme with better Turbolinks instructions.