Algorithm AS 176
Fix scaling bug
Switch kde to use rfft, fix interlacing and integration
fix convolution
Merge pull request #31 from simonbyrne/kde

Fixes for kde
Algorithm AS 176 w/ fixes from simonbyrne
Merge branch 'kde' of github.com:JuliaStats/Distributions.jl into kde

Conflicts:
	src/Distributions.jl
Merge pull request #29 from JuliaStats/kde

Algorithm AS 176 for KDE's