elements now use full screen width
thinner lighter style
use blue as action color, fix small glitches
merge master into full-width
fix some glitches resulting from merge
fixes to participants list, bigger + button
simplify header, use icons for back and cancel buttons
use list icon as back button, make logo bigger
un-emphasize the add participant button
Merge pull request #33 from xMartin/full-width

Style update