Kill config.h and just force-include acconf.h in non-pch builds
Remove -Wno-long-long from default CXXFLAGS

It's no longer nonstandard in C++11 so there's no default warning for
it.
Make subs.delete accept a table of rows to delete

Lua has a limit to how many arguments can be pushed onto the stack, so
when deleting very large numbers of lines at once unpacking a table can
fail.
Keep the old active line when an automation script changes the selection but not active line
Make find/replace and automation text fields unlimited length

On Windows text fields default to a maximum of 30,000 characters.
Initialize the charset converter for the thesaurus sooner

Narrows the window of time for a crash-on-exit when the user exits while
a thesaurus is being loaded.