Translations:What's new in UnrealIRCd 4/2/en

For developers:
 * Easier source navigation. Because we moved almost everything to modules, it's now much easier to see all the code of one particular feature.
 * Cleaner code. There have been a lot of source code cleanups. Code has been restructured or rewritten. Old irrelevant code has been deleted.
 * Development documentation can be found on the wiki. We explain how to write a module in C and list all the details on the various Module API's such as how to write commands, channel modes, plug-in by using Hooks, etc...