Updated for version 3.2.
Added documentation for coding conventions, updated document to use
reference style links to improve readability.
Updated to require ArcGIS API 3.2 for Flex, incremented version numbers to 3.2.
Updated main icon.
Updated description and widget version to 3.2.  Updated icon to use
i_thematic_icon.png to resolve file name conflict with main viewer assets.
Merge branch '#14/update-to-require-arcgis-flex-3.2' into develop