Now client accept following options:
--disable-shm - disable shared memory usage
--enable-shm-uuid - use UUID for shared memory identifier
UUID is useful when a lot of clients starting simultaneously.
Needed for testing and was easier to implement than alternatives.
* Avoid server crash on dummy connect / disconnect.
* Avoid server crash when host left from PreGame.
* Server print it's state with name when it's waiting for connection or in pregame.
* Server will use random port if specified port is busy.
* all lock/unlock and unlock/lock pairs are done by RAII guards now
* fixed two possible crashes at the end of battle when last stack was killed by spell. That should fix#749 and #752.
* fixed a very nasty race condition, eliminating possible deadlock at the start of battle when human hero has tactics
* fixed#422
* spells learning
* no tooltips for objects under FoW
* working resource silo
* new system for simple unit abilities/states
* neutral monster army disappears when defeated
* synchronization between client and server processes
* fixed battle ending
