add TriangularIndexedVector
add indexing function for AArrayVector and descendents
slicing for AArrayVector
misc edits
make band operations final
refactor Vector.equals
optimised add override for strided vectors
Merge pull request #52 from prasant94/develop

Add householder implementation to QR decomposition.
Merge branch 'develop' of https://github.com/mikera/vectorz.git into develop
shrink over-large test case
refactor BandedMatrix get and set
addToArray for banded matrices
banded matrix refactoring
misc edits
refactor to split up vector type generic tests
remove superfluous constructor
allow passing Random instance as seed
test refactoring
allow matrix construction from any Iterable set of rows
docs