Merge pull request #14 from dlfivefifty/master

Updated InvariantEnsembles.jl to support new version of ApproxFun
Modernise Travis test and REQUIRE
Remove duplicate file
Catalan -> Combinatorics
{} => Any[]
Fix test for GSL
Update license
Update package badges
Note optional dependencies in README
Delete vim swap file (?!)
Fix random seed for testing
Merge pull request #2 from jiahao/master

merge from master