Tmp changes

# Many bits and pieces

## Softsusy interface
* Added negative mu CMSSM and nuhm1
* catch the case that SoftSUSY segfaults, 

## constraints
* improved atlas treatment when extrapolated
* updated chargino upper limit to exactly match mc-old

## multinest
* added negative mu cmssm and NUHM1
* sample nuisance parameters according to gaussians
* Made the decision: when predictor fails give high X^2 with a little uniform smearing