Tips and option to disable them

Adds a more general way to handle gameplay tips, and adds
a boolean option "tips", which can be used to disable all
tips.  Adds a helpful longer message when the game goes
into the "farlook" mode.

Also adds a lua binding to easily show multi-line text
in a menu window.

Breaks save compat.

doc/Guidebook.mn

@@ -4529,6 +4529,9 @@ screen.
 uses a timer-based delay.
 The default is on if configured into the program.)
 Persistent.
+.lp "tips    "
+Show some helpful tips during gameplay (default on).
+Persistent.
 .lp tombstone
 Draw a tombstone graphic upon your death (default on).
 Persistent.

doc/Guidebook.tex

@@ -4957,6 +4957,9 @@ screen.  (Applies to ``tty'' and ``curses'' interfaces only; ``X11'' interface a
 uses a timer-based delay.  The default is on if configured into the
 program.)  Persistent.
 %.lp
+\item[\ib{tips}]
+Show some helpful tips during gameplay (default on).  Persistent.
+%.lp
 \item[\ib{tombstone}]
 Draw a tombstone graphic upon your death (default on).  Persistent.
 %.lp

doc/fixes3-7-0.txt

@@ -1977,6 +1977,8 @@ have 'I u' mention whether there are any unpaid items on the floor (unusual
 	but not impossible); it doesn't itemize them or show shop price
 add items given a Japanese name when playing as a Samurai to discoveries list
 make music improvisations more varied and interesting, as well as useful
+give a helpful tip when first entering "farlook" mode
+add a boolean option tips to disable all of the helpful tips
 
 
 Platform- and/or Interface-Specific New Features

doc/lua.adoc

@@ -384,6 +384,15 @@ Example:
  nh.stop_timer_at({x=5,y=6}, "melt-ice");
 
 
+=== text
+
+Show long texts in a menu window. Wordwraps automatically.
+
+Example:
+
+ nh.text("long long long string\nwith newlines too.");
+
+
 === variable
 
 Set or get a global variable. These are persistent, saved and restored along with the game.