Map crop should crop polygon geometry, not they way nodes and then assemble a mangled polygon

[brianhatchl]

whether using hoot convert with -D convert.ops=MapCropper -D crop.bounds="-98.0,31.0,-97.8,31.2" or using hoot crop
the operation is omitting nodes outside the bounds and then reassembling a closed way, vs doing a geometric clipping of the closed way and adding nodes where necessary.

vs