v0.4.1 Embedding icons and template

• Embedded template solving issues related to referencing html file
• Embedded close button image for tip walkthrough into directive file
• Added external js file with icons solving issues related to referencing to icon files
• Updated tests
• Icons folder added to ignore in bower/npm, here for future developments if required
• Changed walkthrough-inner to display as fixed, which is more correct for many cases
• Added ability to add transclude to tip type of on boarding
• fixed bug where click to close on boarding would propagate to underlying item
• Updated Readme
• Bumped to version 0.4.1