[texworks] We've reached r700+; please test

[Stefan Löffler]

Hi again,

a small correction. It seems you (sometimes?) need to do a clean rebuild
of the plugins for them to work with a changed scripting API. The reason
probably is that some of the old calling conventions are still saved in
files that are normally not recreated during an incremental build.

So, first run `mingw32-make clean` (or whatever "make" you use), and
then `qmake-qt4` and `mingw32-make`.

HTH
Stefan