Delete ShapeReadWriter; old format is in LegacyShapeReadWriterFormat.

Added JTSWKTReaderShapeParser using most of the code that used to be in JtsShapeReaderWriter.  JSRW was gutted of that code leaving just the binary format. That'll get migrated further in a bit.

Kept ctx.readShape(str) & ctx.toString(shape) which should still work and remain deprecated.