Clean up imports

All imports now from top level

Also use Distributions.Chi, which now exists, as opposed to taking
square roots of random variates from Chisq.

Closes #21

Author: jiahao

src/GaussianEnsembles.jl

@@ -13,13 +13,11 @@
 # Alan Edelman, Per-Olof Persson and Brian D Sutton, "The fourfold way"
 # http://www-math.mit.edu/~edelman/homepage/papers/ffw.pdf
 
-import Distributions: Chisq
-import Base: isinf, rand
 export GaussianHermite, GaussianLaguerre, GaussianJacobi,
        Wigner, Wishart, MANOVA #Synonyms for Hermite, Laguerre and Jacobi
 
 #A convenience function to define a chi scalar random variable
-χ(df::Real) = √(rand(Chisq(df)))
+χ(df::Real) = rand(Chi(df))
 
 #####################
 # Hermite ensemble #

src/RandomMatrices.jl

@@ -2,9 +2,8 @@ module RandomMatrices
 import Distributions
 using Combinatorics,Compat
 
-import Distributions: ContinuousMatrixDistribution
+import Distributions: ContinuousMatrixDistribution, Chi
 
-import Base.rand
 
 #If the GNU Scientific Library is present, turn on additional functionality.
 _HAVE_GSL = try
@@ -14,6 +13,8 @@ catch
    false
 end
 
+import Base: isinf, rand
+
 export bidrand,    #Generate random bidiagonal matrix
        tridrand,   #Generate random tridiagonal matrix
        sprand,     #Generate random sparse matrix