add isIdentical(.) and hasUncountable()

[danielkorzekwa]

like in SimpleMatrix in ejml,

either

hasUncountable(vector/matrix)
isIdentical(vector/matrix,tollerance)

or

m.isIdentical(m,tollerance)
m.hasUncountable():Boolean

[dlwh]

ok, i added support for these features, but they're a bit different:

hasUncountable(v/m) is any(isNonfinite, v/m)
isIdentical(v1, v2, tol) is isClose(v1, v2, tol)