[dmd-beta] Looks like it's time for a beta!

[Rainer Schuetze]

I'm a little concerned about the current state of the generated JSON 
files. As discussed on the newsgroup it is excessively verbose and 
inconsistent. It's also incompatible with previous versions so tools 
relying on it need to be changed. Visual D for example doesn't find any 
line number info or type anymore because of a different structure, other 
fields are renamed. (Unrelated to the format, but it also seems to cause 
crashes easily, though I'm not sure yet if this is a problem with the 
size, the compiler or the precise GC.)
It would be unpleasant if it changes considerably in the next version again.