range functions
zipf distribution
unnecessary imports
added hypergeometric distribution
cauchy
Variable kernel empirical distribution, very nice.
Merge pull request #188 from stucchio/zipf

Zipf and Hypergeometric
moved rangeF and rangeD to same location as range function. Oops.
split for vectors, not yet for matrices
split now splits on a seq
hsplit for seq also
Merge pull request #187 from stucchio/range

range functions
simplified
created unsafeValueAt which is faster version of matrix value at
update/unsafeUpdate methods
Merge branch 'perf' into split
Added benchmarks measuring matrix traversal for row/col order or col/row order.
added benchmark for value mapping
created hsplit for matrix
vsplit