fix(tooltip): don't show tooltips if there is no content to show

Closes #129
docs(dialog): fix README
fix(collapse): Avoids fixed height on collapse

Closes #138
fix(tooltip): fix placement issues

Closes #115
demo(*): update instalation instructions

Closes #135
chore(*) bump up Bootstrap version to 2.3.0
demo(*): add google verification meta
chore(*): add google analytics
feat(buttons): add checkbox and radio buttons

Closes #53
demo(pagination): remove largest pagination from demo
demo(*): various visual improvements
demo(collapse): Added collapse demo

Closes #146
style(collapse): fix apostrophe in docs
refactor(modal,dialog): Harmonize $dialog and modal

Closes #128, #13