V2.6 - LIM UI Changes to reflect PIM

Incorporated following feedback:
• Changed Map information icon to use the "i" icon
• Renamed Map information panel to About
• Replaced the "Map Information" header to be the applications title
• Removed the AboutDialog button and code
• Added "last modified" information under the about description
• Added "Find out more" in the about panel (link to the ArcGIS item)
under the last modified date
Merge pull request #12 from CTDisasterManagement/V2.6

V2.6 - LIM UI Changes to reflect PIM