Merge branch 'bug/830-upgrade'
Revert "Show burndown charts with User timezone dates" Fixes #815

This reverts commit a462a134a34765cf7e1a2543de7e5060cbaa893c.
Reason: using user's timezone here merely influences the Graph legend.
If you happen to cross date boundary against server time, the date
names just shift and display irritating information.
timezone for burndown, explicitly explain what happens with dates/times on burndown

settings page explanation text
sanitize Time.zone in before-test
Merge branch 'feature/burndowntimezone'
taskboard header use fixed positioning, align vertically using js. fixes #828

make room for impediments row

copyright
Merge branch 'bug/firefoxtaskboard'
Merge branch 'master' into wibas/master

Conflicts:
	assets/javascripts/jquery/jquery.verticalfix-min.js
	assets/javascripts/jquery/jquery.verticalfix.js
use before_save hook and do not save twice for fixing remaining hours type, fixes #826
Merge branch 'master' into wibas/master
enable inline release title editing on master backlog page
Merge branch 'release/titleedit'
sidebar: show burndown explanation only in full mode
remove jeditable, we do not use it
refactor editor dialog classes
cleanup monkey-inheritance
remove unused compact view styles for taskboard
note purpose of RB.Model
trailing whitespace
separate initializing app code from taskboard object