analyze: allow to disable goal marking
analyze: add cvars descriptions and bounds
nav: added optional post path smoothing for astar algorithm
nav: now bots will use Dijkstra algo instead of floyd-warshall if memory usage too high (controlled via yb_path_floyd_memory_limit cvar) (fixes#434)
nav: vistable are now calculated every frame to prevent game-freeze during loading the game (fixes#434)
graph: pracrice reworked to hash table so memory footprint is as low as possible (at cost 5-10% performance loss on practice) (fixes#434)
control: bots commands now is case-insensitive
bot: major refactoring of bot's code
nav: issue warnings about path fail only with debug
practice: check for visibility when updating danger index
analyzer: suspend any analyzing on change level
control: add kickall_ct/kickall_t
nav: increase blocked distance in stuck check
