Updated the ship detection model with an improved version

Enables the extension of end dates in subscriptions

• Added usage tracker to the bottom of Explorer
• Improved Contact Sales Form
• Added Weekly Basemaps

All bands now have human readable band descriptions (ie red, blue, green, NIR) and the color interpretation for 4-band imagery now reflects the BGRN band: band ordering in GIS tools such as QGIS or GDAL will now correctly reflect BGRN ordering instead of assuming RGBN.

• Added new SkySatScene asset type basic_analytic_udm