update docs to use buttons for tooltips

BS3 commit bc93a429a8dc981dce39a878c8dd279f250db92d
add better th support for table classes

BS3 commit 768e7edabf0613b1537ea2d5eb422b2069f4466c
add better th support for table classes. Moving navbar inline properties to variables.less and customize.html. Moved navs inline properties to variables.less and customize.html & nav-customize.html. move masthead and toolbar inline properties to variables.less

BS3 commits 768e7edabf0613b1537ea2d5eb422b2069f4466c,
f94d9ce096c27ac5092b01a1b412142dd30a54a5,
a06afd8320418c50e433d1a4215b6553e3657152
Navbar toggle is not vertically aligned (3.0.0-wip) with custom navbar height. Moving navbar inline properties to variables.less and customize.html. move masthead and toolbar inline properties to variables.less

BS3 commits 4d42100a3ea3b926b78d282898c421473fe52128,
f94d9ce096c27ac5092b01a1b412142dd30a54a5
add better th support for table classes

BS3 commit 768e7edabf0613b1537ea2d5eb422b2069f4466c
Moved navs inline properties to variables.less and customize.html & nav-customize.html. move nav-tabs-google inline properties to variables.less

BS3 commit a06afd8320418c50e433d1a4215b6553e3657152
Moving navbar inline properties to variables.less and customize.html. Moved navs inline properties to variables.less and customize.html & nav-customize.html. move some thing around. move masthead and toolbar inline properties to variables.less

BS3 commits f94d9ce096c27ac5092b01a1b412142dd30a54a5,
a06afd8320418c50e433d1a4215b6553e3657152,
c7995cf9645f52966c142d682f1746840572875d