added additional constructors
Added TilePyramid.realign, method to realign a tile based on a different origin
using the correct format argument
some sanity checking in the constructor
properly creating schema with reight crs on geometry field
date format not thread safe, and only parsing to date when necessary
Nano server improvements.

- added maps handler
- reprojection in feature handler
renamed NanoJeoServer to NanoServer
renamed Viewport to View