Created a class PreferencesData to manage all parameters except the ones for the GUI.
Removed GUI parameters management from ParametersMap.
Created ParametersHelper class to help with GUI parameters management.
Used ParametersHelper in Themes.
Wrapped the every string literals with _(...) function.
The _() function resides in "app/src/processing/app/I18n.java",
which translates the UI texts using "Resources_XX.properties" file
where XX is the locale code.
I provided the properties file for the ja (Japanese) locale.
I created this file using "xgettext" and "msgcat" commands.
"i18n_update.{py,sh}" files are the tool I used to do that.
Change in "app/build.xml" is to include the properties files
in jar file.
Also, the Sketchbook and Examples menus are currently disabled on the Mac to work-around a bug in Apple's implementation of Java. I think this bug may have been solved, so I should try re-enabling the menus and see what happens (on 10.4 and 10.5 and 10.6). Also, I may still need to update the jre / jdk on Linux.
