refactor!: Generalize tile traversal interface (#391)

* add plan

* Add interface

* Refactor raster-tile-traversal to use generic interface

* define tms adaptor

* add projectedBounds

* Adjust TMS to interface

* Add Corners type

* take aabb of corners

* Rename to projectedTileCorners

* refactor bilinear interp

Author: kylebarron