standard header typography and annotation styling

We were using header tags for the annotation user name and time for
which we mangled the typography to fit this use. This restores the
suggested UA styles for header elements and reworks the annotation
user line to fit the way it was before.

In addition, the time is moved up to the top line.
restore LTR order of top controls
restore right-float of privacy control
de-bold the reason/no reason preface
remove margin on hidden button bars
Easy fix for bug #352
comment out favorite action for now
Merge
Merge pull request #353 from hypothesis/352_fix

Easy fix for bug #352
pull the timestamp all the way right again
better magicontrol css and slight control spacing

more margin between controls
try with the controls at the bottom
don't force icon class color
dead code removal
simply classes on delete/edit preface
comments
dead code removal
style fixes to close button after recent changes

Fixes the color and position.
self closing is apparently not cool

Chrome totally choked on this one and screwed up the auth sheet.
remove straggling color from icon