Added bootstrap navigation bar skeleton - need to incorporate angular components
Modified navigation bar - changed index.html to incorporate angular components. Modified main.css to overwrite bootstrap styling. Modified not_signed_in.html and signed_in.html to use bootstrap classes.
Modified navigation bar - still need to vertically center content div
Removed connect-flash for Eugene
Merge pull request #80 from AltitudeHK/fixNavigationBar

Modified navigation bar - still need to vertically center content div