Fix bug in symlog with 0-values in data. (Thanks Christer)
Minor bug in accepting "sans serif" as a font family alias.
Forgot to commit test images.
added get_children offsetTex patch; closes sf 3001208
gridspec supports grid of different cell sizes
fix a formatting issue of gridspec docs
update docs. for gridspec
merge mpl_toolkits.gridspec into the main tree
fix a bug in AnnotationBase._get_ref_xy
