removing dead, commented-out code from test/clojure/grey_duck/math.clj

this is also the first commit from weep-softly
adding blanks unit test for #10
removing dead code in blanks unit test
adding bitset shift-right function and unit test for the same
close #10
close #7
close #7
close #9 ...is what the message on the last commit should have said
Merge branch 'dev'

this is the prep for the v3.0.0 bump

bringing into master the dev fixes to issues: #7 #9 #10

note that only fix for issue #10 necessitates the major bump as it removes the
"-e" command line option