Callout to DMD hackers

[Andrej Mitrovic]

Recently Vladimir Panteleev has ported the DMD Source Guide from 
the old wiki to the new one[1], and updated it with up-to-date 
information. I've added a "DMD Hacking Tips & Tricks" section[2], 
which should help people new to the codebase to start hacking on 
DMD-FE. I've only added a few tips that I know of.

If you regularly hack on DMD and know some good tips for new DMD 
developers, please either post those tips in this thread and 
we'll add them to the wiki, or you can directly add them to the 
wiki. Everybody benefits from sharing knowledge about compiler 
internals. For example, GCC has pretty extensive documentation 
about its internals[3].

[1] : http://wiki.dlang.org/DMD_Source_Guide
[2] : 
http://wiki.dlang.org/DMD_Source_Guide#DMD_Hacking_Tips_.26_Tricks
[3] : http://gcc.gnu.org/onlinedocs/gccint/