suppress tabulations
Optimize if_else Eigen specialization

This doesn't help noticeably; I'm pretty sure we need to let the
arguments to select() be expression templates, not just the *this
object.
Raise tol, print relative errors

Same reasoning here as for cea_evaluator_vec_unit
slight reformatting
Another tolerance increase

This isn't quite as bad as the cea_evaluator case, but the
soon-to-be-committed cea_thermo.h changes do increase our roundoff
error here.
Use if_else in cea_thermo.h
Bugfix for compilation without VexCL
More if_else usage
Finishing up if_else conversions

Now to run some more timing tests and see if I missed a spot.
keeping up-to-date
Merge branch 'master' of https://github.com/libantioch/antioch into EquilibriumEvaluator