made modal.html and changed the controller

to reflect and show the modal page in the side bar for components.  Bare content right now, but it basically copies the documentation of ui-bootstrap for using modals.
fixed a small mistake I noticed in the info-button.html, corrected malformed html.
fixed buggy css for code examples

I noticed that code examples would show two vertical scrollbars all over the sytle-guide rather than one.  This css change fixed the issue.
added ui-bootstrap dependency
Merge pull request #80 from Rise-Vision/feature/update-ui-bootstrap-modals

Feature/update ui bootstrap modals