Apparently g++ does not like DenseCoeffsBase, but is ok with DenseBase.  Odd.  This should fix the compile errors on Jenkins.
Apparently g++ does not like DenseCoeffsBase, but is ok with DenseBase.  Odd.  This should fix the compile errors on Jenkins.

stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/stan,stan-dev/stan,stan-dev/stan,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/math,stan-dev/math