Version 0.4.0

• converted input field to a search field type
• added examples/mobileview.html example for mobile ready version
• added option alwaysOpen to keep search field always visible
• exposed show(), hide(), hideResults() removeMarker(), removePopup() functions
• updated event handling to prevent click events from propagating to map
• changed default icon from directions type icon to magnifying glass icon
• added topcenter as a position for the control with autosizing to mobile viewports
• clicking on the icon no longer clears out the marker; clearing the search field does so instead
• added ability to override Geonames URL