fix pluralization since "a" is in front
Merge pull request #7287 from waynn/patch-1

fix pluralization since "a" is in front for issue #6342
Merge branch '3.0.0-wip' of https://github.com/FestivalBobcats/bootstrap into 3.0.0-wip
added optional boolean parameter "autoselect" to bootstrap-typeahead.js, tests and docs updated accordingly