Add new tl
add doc about translations for the launcher
Add a German Translation of the launcher. (By NoJoker)
Add screen profiling.

For now, this is intended for Ren'Py development use, so we can
see if sl2 is actually making things faster, as optimizations are
implemented.
sl2: Fix parsing layouts.
sl2: Persist the cache.
Add _clear methods to containers.

This facilitates reuse of the underlying displayable.
sl2: Reuse displayables where possible.

Reusing a displayable is possible when we realize that the positional
and keyword arguments of the displayable are the same. We can also
reuse the transform if we apply the same transform to the
displayable.
Update launcher/game/tl/spanish/android.rpy
Add Korean translation, by Baekansi.
Merge pull request #349 from LuqueDaniel/update-es

Update Spanish translation.
Improve wording of sl/sl2 syntax errors.

Fixes #348.
Merge pull request #344 from kyouryuukunn/update_doc

add doc about translations for the launcher
Edit a bit.
Extend tkaskdir to handle non-ASCII directories.
Only enable config.rtl in the launcher iff Arabic is the language.

This is a workaround for #351, which only seems to manifest on certain
Macs, and hence is proving hard to actually fix. At least with this
change, it will only show up when switching to Arabic. (And may not
show up at all, as it may have something to do with filesystem
encodings.)
Merge branch 'master' into maintenance/6.17.5
Bump version.