Fix #8446.

Provides a universal default action (ignore) when a key cannot be found in the
keymap.
Merge pull request #8462 from blakejohnson/default-ignore

Fix #8446.
Merge branch 'master' of github.com:JuliaLang/julia
added binding to lapack/trsen
added ordschur
added documentation
added wrapper for ordschur(::Schur, select)
ordschur!(::Schur, ..) now also updates :values, added test
added complex trsen methods
improved test
added export to base namespace
added static test, fixed empty array problem with @test_approx_eq
fixed bool use of sum(select)
trying Cint as logical type
trying BlasInt as logical type
removed static test