Add autoplay, level and :back input, fix timers in test mode
Add 'Pass Counter' and delayed attach, fix wall collisions
Add block counter, remove lamented slot and escape method
Purge lamented crates, add 'on-which-side-i-am'
* Add initial vacuum crate
* Add 'run' target to Makefile
* Continue implementing
Fix Makefile, implement initial movement
* Fix the sources wildcard in Makefile;
it was not updated when the source files
were moved into a subdirectory.
* Implement initial movement into east,
west, north and south directions.