Using a local __choice like in map to avoid unnecessary inconstantness
This is same-behavior, but I would be in favor of reseeding only at the beginning of the day/night instead of every time the summon menu is opened (next commit)
don't use single-underscore names
if available, use the thread-safer invoke_in_main_thread (not required when setting the global variables)
set __lock to True outside of the thread, otherwise if the thread starts late, the while loop is skipped
call get_character_object in the main thread
big work
what was reliable before is now not, in recent versions of renpy, which is why we added that new config (which I put in say.rpy, but it can be moved somewhere else)
Also fixes the game_menu's title position, incidentally
some changes are incompatible with my diary and achievement branches, respectively, they will need to be merged with a bit of manual care
make the move subpixel
remove the old unused cloud_move
separate the three clouds' moves, both the yoffset, the x speed and the x start time (with a time offset)
the "on show" wasn't working for some reason and wasn't necessary anyway
easeout was probaly mixed up with easein, in any case easein renders much better
using easein_cubic for a sharper explosion
remove two blank images (useless and slower than Null())
clarify in weather.rpy which are images directly shown on the screen and not just ingredients for the others
simplify the screen code
