scalar add and sub
equals overrides
JoinedArrayVector
JoinedArrayVector tests and fixes
vector setting with arrays
more overrides and fixes
Add DoubleArrays utility class
more JAV implementations
more JAV implementations, double array functions
rename to DoubleArrays
JAV subVector
fix JAV subVector
more DoubleArrays code
misc extra implementations
more overrides
trace implementations and tests
More trace overrides