corrections on benchunits files
fixed conflict
Merge pull request #12 from scidom/master

MCMCLikModel type improvement
Merge pull request #13 from scidom/master

Ported RMHMC
Merge branch 'master' of https://github.com/JuliaStats/MCMC.jl
Ported MMALA
Ported SMMALA
Added TODO file to keep track of future developments
Minor correction in TODO file
Allowed samplers to store gradients (HMC and NUTS are pending on that respect)
HMC and NUTS store gradients now
Ported zero-variance estimators
added examples, corrected issue with gradient func for model as expressions, added another test script
Merge branch 'master' of https://github.com/JuliaStats/MCMC.jl