Squashed 'wicker/' changes from b832fb3..abe46ba

abe46ba general improvements and bugfixes; Lua 5.2 mimicking

git-subtree-dir: wicker
git-subtree-split: abe46bab035fe62214dd94ef7fbed32b49197580
(wicker) Lua 5.2 mimicking; general improvements and bugfixes.
some whirlwind tweaks; debugging utilities