v2.0.0

• Add max attribute to help handle maximum allowed tag selected.
• Curvy material design look for added tag
• Work on type head , so user can use direction signs (down, up for just activate typehead) to select item in it
• Type head should hide when the users clicked outside the typehead
• Convert the event emitted to be event passed to the directive instead, check the read me for event method
• Make delimiter to allow array of separators (space separator aint working well yet)
• attribute of directive that can assume default values are now optional instead of creating them with empty quote attribute=""
• Styling on different browsers working
• Add travis build test