Using the NumericExtensions package facilities
Using NumericExtensions and moving many methods from Distributions to GLM.
Switched glm to using DensePredChol and modified weights approach.
Pass a scratch array to the weighted least squares calculation

To cut down on the allocate/free activity and the copying.
Reorganized method definitions in src/glmfit.jl

Corrected a typo and reorganized tests.
Bump dependencies
A link now defines only linkfun!,linkinv! and mueta!
Move large example to the perf directory.
Merge pull request #30 from JuliaStats/db/map

Refactor the lm and glm calculations