basing Matrix on BTAS.
restart job temporarily disabled
delegating some operators to btas
delegating some operators to btas
Merge branch 'btas' of https://github.com/shiozaki/BAGEL into btas

Conflicts:
	src/math/matrix_base.h
rebasing DFBlock to btas 3-index tensor
DFBlock::get_block now returns Tensor3
debug code removed.
unnecessary functions removed
resize is implemented properly

will check on parallel computers
FORGOT to add this file
fixes suggested by Ed
minor
Merge branch 'btas'
fixed the opt bug
importing the latest btas
oops
default container is now varray