Remove mean() as the dim/region argument has made it into base.
Merge pull request #7 from blakejohnson/remove-mean

Remove mean() as the dim/region argument has made it into base.
Change autocor to use same mean and s.d. for both samples making it behave as the similar functions in MATLAB and R.
Add a Travis CI configuration
Merge pull request #9 from JuliaStats/anj/autocor

RFC:Change autocor
RFC: amap was deprecated, using mapslices instead

Looks fine, comparison with R (using Rif):

```
julia> cor_spearman([1.5,1.5,2.2,2,3.5,3.55] , [1,2,3,4,5,6])
0.9276336570439175

julia> R("cor(c(1.5,1.5,2.2,2,3.5,3.55),c(1,2,3,4,5,6),method=\"spearman\")")[1]
0.9276336570439175
```
Merge pull request #10 from diegozea/patch-1

RFC: amap was deprecated, using mapslices instead
Expanding logsumexp, softmax, and pventropy to allow both per-column and per-row computation.