log4javascript 1.4 released

This is a major release with some new features and several smaller enhancements and bugfixes.

Changes include:

- Three editions: Standard, Production and Lite
- Hierarchical loggers identical to log4j's
- New command line in the logging console, with command history and several built-in command line functions
- Multiple log messages in a single logging call
- Grouped log messages
- Built-in timers
- Support for IE8 beta 2 and Google Chrome