not sure why this changes weren't already here
make model have a test point
AddVar -> model.Var ...
use only continuous vars for derivs
missing func
 updated examples
added some more distributions
added survival
-mcex
-mcex
back to top level class based step methods so that parallelism will work
Merge pull request #148 from twiecki/pymc3

BUG: fmin_Hessian should be fmin_bfgs.
readme update
switched other samplers to object based
different randomization approach for hmc
added 0 truncated T distribution
Merge remote-tracking branch 'origin/pymc3' into pymc3
merge with parallel branch
added example tests
missing clean point