Adapt DataFormats/Math to work with the new SMatrix.
use c++14 smatrix
add SMatrix constructor w/o initialization
do not zero jacobian
avoid zero in similarity
do not rezo matrices that will be soon fully filled
avoid copy constructor
avoid copy constructor
Drop spurious Math directory.
use c++14 smatrix
add SMatrix constructor w/o initialization
do not zero jacobian
avoid zero in similarity
Drop spurious Math directory.
add constexpr in few more critical places
Pilot blades enabling/disabling in pixel digitizer
Merged CMSSW_7_1_X from repository cms-sw
Fixing conflicts
Fixing conflicts2
Fix a bunch of clang reported issues.