use CanvasAxisTickRenderer for burndown x-axis to fix label rotation

fixes #810

Not sure the reason why this got commented out at 56789e70018f4ab474f03ca6c0f0814e1ab13409
show as much as possible for sprints in sidebar
remove labels from sidebar burndown
catch some weird jquery unrecognized expression error.
Merge branch 'patrick/ui/chart-labels'
reformat version display: use git describe to show backlog version commit along with the last tag
add assignee, project and custom fields to story tooltip. fixes #809

may impact performance
liquid two column layout for master backlog page

set editor width for sprint title

set story subject editor width

relase storypoints and story header widths
set backlog to full width if other panel is hidden - use view options to trigger this
multiline subjects, fixes #808

add multiline button to toolbar

store multiline in UserPreferences
fix for IE: burndown options, story editing
Fix project settings page for rails 2 and 3. Fixes #814
Added missing french translations + clean up
fixing string in label_view_options

Select box won't take apostrophes
Merge pull request #816 from yuters/master

Added missing french translations and cleanup
travis global timelimit of 50 minutes. Split into clusters - again - but test only subset of matrix
Merge pull request #817 from backlogs/patrick/tooltips

add assignee, project and custom fields to story tooltip. fixes #809
Merge pull request #818 from backlogs/patrick/liquid-layout

Patrick/liquid layout
rename project_sttings_tabs chain, fixes #794
revert using of hook for project settings, simply inject our tab into project_settings_tabs