Updated unit test for tooltips. Now using is() instead of hasClass()

fix broken css tests, add fluid input-prepend/-append to tests, fix input-prepend/append for responsive for both fluid and fixed sizing

2.0.4 wip fix placeholder

adding the `&` combinator to `.placeholder` makes it work for the global case (in forms.less) as well as within `.navbar-search .search-query`

the result can be seen in the generated bootstrap.css, which include the -ms vendor extension.

fix navbar button for mobile tapping (turn to button instead of adding href=#), streamline less docs page

Added unit test to check that tooltips is not showed when leave event is triggered before show delay has expired AND the hide delay is set to 0

fix resizing issues from incorrectly changing <767px grid classes to inline-block, fix height issue on textareas