WiP...
lua-utils: always pop initial nil in mrp_lua_object_collect_array.
lua-utils: support funcbridge calls to autobridged member methods.

Calls to autobridged member methods (from Lua to C) arrive at
funcbridge with an extra table at the bottom of the stack. If
an autobridge has indicated that it wants to use/examine the
Lua stack, patch the stack to look pristine for the duration
of the bridged call.
WiP... removed unused #if 0'ed old bridge hack.
lua-utils: simple stylistic unification, basic comments on visible routines.
lua-utils: removed unused/mind-dump parts.
WiP: temporary autobridge test.
WiP: temporary autobridge tests in sample config.