a binary stream. Fix box/cjson test.

Continue pruning memcached.

Conflicts:
	test/box/lua.result
	test/box/lua_misc.result

Remove memcached support in 1.6.
We're about to change the type system.
About to add authentication.
This all makes supporting memcache within the core too cumbersome.

Fix confetti error output. Remove redundant cfg_reload(). Make sure we
produce a Lua error on error.
Remove duplicate code.
Style renames.

lua console. Refactor errinj lua bindings.

lua console.

wal/big tests worked with system spaces which had no system spaces
data. Which is good. But not the way it is supposed to work.

Conflicts:
	src/box/lua/box.lua

Remove a piece of dead code which made select_range() and
select_reverse_range() extremely inefficient (a new iterator
instance for each tuple) and confusing.

box.index.iterator() creates a closure which is sufficient
to produce all iteration results. Use of index:next()
was apparently left by some tricky merge.

dostring() from init.lua, remove space declaration from a configs

and the new data dictionary