Merge branch 'release/2.1.8' into dev
change bower for Bower register
ref #235
update title tag of example pages
fix mobile nav to correspond to global
fix #239
set up treecrub to always toggle caret on close
by using the standard bootstrap events
set first item of treecrumb as link
fix #240
update bootstrap-sass-official to 3.2.0
add Accessibility.md
ref #244
update Accessibility.md
close #244
add checklist to Accessibility.md
ref #244
update nav-services with role navigation
update global navgation
ref #242
update tables with `scope` instead of aria attributes
fix #238
remove ttablesorter's active class on whole column
fix #220
add `fieldset` tag around checkboxes and radios
fix #142
fix behavior of dropdown losing z-index on click inside
fix z-indey error when opening other dropdowns
mini-fix for modal element
update search field on styleguide theme
fix print button position on titles