Merge pull request #10 from JuliaStats/devel

Model-related types operational after recent changes
added diagnostics reporting and a tuner to RWM.jl
Updated model function and README.md
corrected bug in model(m::Expr...)
updated README
small improvements to model(m::Expr...)
reactivated HMC
Reactived MALA (using the new Tuner and SamplerTask type-template)
updated benchmarks to new syntax
tweaked binomial benchmark
Merge branch 'master' of https://github.com/JuliaStats/MCMC.jl
added NUTS sampler
updated tests to include NUTS (they pass)
slight modif of seqMC + updated README
corrections on benchunits files
fixed conflict
Ongoing devel of RMHMC
Improved MCMCLikModel type (simplified UI and facilitation of RMHMC coming def)
Merge pull request #12 from scidom/master

MCMCLikModel type improvement
Ported RMHMC (there is a bug somewhere - to be fixed)