Update buildtest.cc

make sure chi2>0 for all tracks (some saved with chi2 ~ 10^-20!)
Remove old Matriplex implementation.
Remove references to old Matriplex files and tests.
Remove old Matriplex test programs.
Remove file with old matriplex multiplication code.
Remove old Matriplex code etc.
Add entries for ConformalUtils; also pass openmp option to linker.
Copy in current version of Matriplex from osschar/mtorture.
Start taking notes about re-import of Matriplex.
fix inverse pt residue
Merge branch 'devel' of github.com:cerati/mictest into devel
Add Matriplex tests.
Changes from mtorture.
Add inline hipo() and sincos4().
Add variant with fewer temporaries and Taylor sin/cos: propagateHelixToR_fewerTemps().
Minor changes ported from mtorture repo.
Matriplex fitting code and corresponding test.
Disable Matriplex by default, fix compilation errors.
Merge branch 'devel' of github.com:cerati/mictest into devel
used -fopenmp for MacOS