Remove references to secret doors from the tutorial.

The second level of the first tutorial is a bit empty now.
Update the tutorial french translation.

Formatting fixes, nowrap tags, tutorial3 translations pulled from transifex
and delete obsolete secret door entries.
meatsprint changes

* The Meatlord spawns more consistantly. He appears randomly but always
  somewhat near to the stairs.
* Viles spawn a bit later.
* The Captor has sentinel's mark instead of slow.
* Walls turned to rock and viles given dig instead of slow to prevent people
  from camping out forever.
Don't give Lugonu piety for kills in the Abyss

Lugonu expects worshippers to spend their time more productively by spreading
chaos outside the Abyss.
Remove maxhp and mp costs for Lugonu's Enter the Abyss

Now that it no longer drops you safely on an upstairs when exiting the Abyss,
the permanent cost isn't so necessary. It's still hugely powerful, but already
has an appropriately high piety cost.
Fix formatting of tutorial translations.
Transifex sync for some tutorial translations.
Stop treasure rooms being overwritten in layout_roguey
Fix vault overriding in layout_city
Less arbitrary drowning in the abyss.

Childproof the abyss.
Decline to shift the square the player is standing on to lava or deep water.
Give Healers and Priests balanced starting stats.

They both had unbalanced starting stats for no apparent reason, especially
healers having the worst dexterity in the game.
Don't activate minotaur retaliation while under Ely lifesaving
Level map cursor fixes for WebTiles

When changing level defer sending cursor until the map has been sent, so
that the correct origin coordinate can be used.
Send the map cursor with full updates (for new spectators).

Only delay sending CURSOR_MAP

Send all cursor types for full updates
Don't capture unnecessary keys as WebTiles spec

Also stops sending pointless key/input messages to the server while
watching.
Fix #6634 (scrolling in the manual after jumping to a section is broken in Webtiles).
Webtiles: Fix the ? key in stash search (#6630).
Don't let rain create deep water in Sprint
Identify some guaranteed items in shop vaults
Add formatting fix.
Don't let Imprison work on conjured monsters (IOOD, battlesphere, etc)