docs/NoName-2009-03-12: add missing screenshot
contrib: add sticker that was actually printed

While sticker_stickma_black.svg is the file that we originally provided,
the file that we got back from stickma and actually ordered is the new
one.
contrib: add per-workspace-layout.pl
Abstract binding configuration to bindings.[ch]

Create files bindings.[ch] to contain functions for configuring,
finding, and running bindings.

Use the new function `configure_binding` for binding configuration. This
function adds a binding from config parameters.

Export the function `modifiers_from_str` from config_directives.h.

This change is made in preparation for the new bindmouse functionality.
Revert "Do not create container pixmap when not needed"

This reverts commit 6578976b6159437c16187cf8d1ea38aa9fec9fc8.

fixes #1170
i3bar: fix resource leak: statusline_ctx needs to be freed first

In practice this is rarely noticeable, unless you very often switch
screen resolutions, I think.

fixes #1172