add unsafeet and unsafeGet for matrices
unsafe matrix get and set implementations
AVector unsafeGet
AVector unsafeSet
use unsafeGet where appropriate
more careful bounds checking
Make StridedMatrix final
more unsafe operations
More unsafeGet usage
more unsafe overrides
more unsafe operations
complete AMtarix operations with unsafeSet and unsafeGet
lots of unsafe operation usage for AVector
unsafe testing
Tighten up index checking excpetions