gvSIG CE (Community Edition) Code

- Properly set font and font AA rendering hints from application defaults.
- Allow system properties in launcher script to override application defaults.
- Support "Skin" Look and Feel engine for Swing.

- Added method getLogFileName() to return full path and name of log file as set by Launcher.java.
- Added support for additional Swing L&F engines in Launcher.java.

Some tweaks to the error notification dialog:
- Check if log file is actually non-null before referring to it in the error message.
- Catch a common AWT error that is caused by changing the display configuration while running the application and handle it gracefully.

- Added null pointer guards to add/removePropertyChangeListener methods.

- Added null pointer guards to add/removePropertyChangeListener methods.

- Added full error diagnostics to log in case loading a settings panel fails.

- Added logger info to show which settings panel(s) were loaded into an extension's settings dialog.

- Implement three different EDT debug levels for use by Substance:

0 = "none"
1 = "warn" (default)
2 = "exit"

These can be configured by setting SUBSTANCE_EDT_DEBUG_LEVEL in the launcher scripts.

- Fixes an out-of-bounds condition when trying to set up cell renderers for tables with incomplete models.

- Fixed wrong positioning of hover indicator box behind icons on toolbars.