Added initial version of ARS sampler
Added test_ARS.jl, removed debug section in ARS.jl
Added a few comments, returned sample is not correct in MCMC sense
Added weight to diagnostics, played with filtering out rejected ARS samples.
Working on full array support in ARS
Array based ARS
Updated stats to use MCChain's useAllSamples field
Updated test_ARS.jl with @test_approx_eq
Included a sample of length 200 in test
Replaced all nsamples by size(c.samples, 1)
Merge branch 'master' of https://github.com/JuliaStats/MCMC.jl

Conflicts:
	src/MCMC.jl
	src/runners/SerialMC.jl
First part of removing useAllSamples
Removed useAllSamples from MCChain and ARS sampler
Simplified indx in ess lines 21 & 44
Adding test case for bi-variate ARS
Updated formulation of g1(x) for multivariate cases
Print M0 & M1 values
Removed summation in test_ARS2.jl h1(x)
Updated ARS.jl (removed extra diagnostics). Updated bivariable test.
Removed fetching "weight" from diagnostics as it is no longer avaliable.