Char creation: Profession scrollbar fix.
Add an information message when you start studying a book to tell you how to stop. Addresses #1505.
item: ensure the same default initializers are applied for all constructors as well as item:make. Fixes 'charges' leak in mapbuffer::load
Might as well increment savegame_version since save compatibility was busted
since the 1st. Also, made a global variable
Merge fix to character creation scrollbars, reading cancallation notification, and item initialization unification.

Conflicts:
	game.h
	item.h