[texworks] Scripting file access

[Stefan Löffler]

Hi,

recently, reading and writing files from scripts was added. Now, I've
also gone over the other system access related functions (thereby fixing
a few bugs), and they should be consistent now.

All of readFile, launchFile, and system return maps (tables, objects,
dictionaries, or however they are called in the respective scripting
languages) now to provide additional information to the script. This may
require some minor changes in scripts of yours that use one of these
functions and depends on the return values. The default example scripts
are available as always at
http://code.google.com/p/texworks/source/browse/trunk#trunk/res/resfiles/scripts.

HTH
Stefan