Merge pull request #10 from trontrytel/master

wip on blk_2m
cleanup in blk_2m function signatures
cleanup in blk_2m function signatures
removing rhod from blk_2m::forcings_columnwise arguments
sync
making bulk schemes float compatible
probably better nvcc options...
removing dt from blk_1m::opts
sync
removing dt from blk_2m::opts_t
sync
renaming blk_1m and blk_2m arguments to match notation used in paper (rhod_th -> rho_e etc)
renaming blk_1m and blk_2m arguments to match notation used in paper (rhod_th -> rho_e etc)
elementwise -> cellwise
elementwise -> cellwise
wip on sedi