bug in incanter.stats.sample-wishart fixed
trigger build
Sel returns dataset when :rows :all specified

Before the fix a simple list was returned for datasets with a single row
when :cols :all :rows :all was used. Although sel is supposed to return
simple lists only when at least one of the query params :rows and :cols
is an atomic object (index or name).

Fixes github issue #235
Calling kurtosis correctly with SD instead of variance

Fixes github issue #226
Merge pull request #260 from nblumoe/fix/kurtosis

Calling kurtosis correctly with SD instead of variance
Merge pull request #259 from nblumoe/fix/sel-on-dataset-with-single-row

sel returns dataset when :rows :all specified
bugfix for #261
fixed test to handle new rank-index function
Merge pull request #262 from etosch/master

bugfix for #261
update median to return Double/NaN when provided an empty list
Merge pull request #263 from chausler/master

Update median to return Double/NaN when provided an empty list
JC: Add sel filter test
JC: Add group-on test
JC: Follow sel :filter rename to group-on
Merge pull request #267 from johnchapin/group_on_fix

Follow sel :filter rename to group-on
syncing with latest changes in master