Revert "Check if the travis lock up is deterministic"

This reverts commit 213495867a7218fc28d5c7898522ecbd96bf4b5c.

No, the travis lock up is not deterministic, this time it didn't happen
with absolute the same execution, except that the initial RNG seed
was given as an argument, not from System.Random. So this is most
probably caused by a bug in libs or GHC 7.6.3, so I won't bother,
at least until I can reproduce it locally.
Rework Containers to capture more inventory logic in types
Pick up to equipment, apply and project from equipment
Don't lose local inventory when actor killed in shared inventory mode
Let AI share swords with teammates in shared inv mode
Rename Stamina to Calm
Decrease Calm when hit or when a close monster felt, regen otherwise
Require calmness for inventory access and projecting
Distinguish inventory and projectile calmness failure messages
Unify all 4 inventory-management server commands
Cap Calm when regenerating
Check calmness in AI when managing inventory and when projecting
Fix inability to leave floor inventory if started in one
Fix and refactor game texts related to inventory management
Rename wield/take off to equip/stash
Improve description of calmness problems
Refactor client inventory operations
Fix wielding from the floor and refactor pickup
Unify all 4 inventory-management client commands