Fix centering xtick issues
Fix xlables
Show the plot if no filename defined
Query chart save format from yaml
Add format/ Change format to png
Remove bottom labels
Add `all' chart
Add bar value labels
Update bar charts:

*   Add padding to x location

*   set bar, face and error colors

*   set title size
Update ignore, ensure ignore of slide PDFs
Add poster for 2013-08-02
Add link and PDF of poster