Merge branch 'master' into rst-table
better class inheritance
factorize as common method
basic merge rows command (down)
replace + by | when is needed
some helpers methods to simplify the code
vertical cell merge
add keybinding for vertical cell merge
basic horizontal cells merge
keybinding for horizontal merge
update mac keybinding according linux one convention
update documentation for the new cell merge feature
Merge branch 'rst-table'