Time to invent a different file format to hold meta data info

[davidl]

I hope it will be integrated to the Compiler. As IDE should not deal with  
language changes.
Dealing with parsing sources of D1, D2, D3, D4... is actually cumbersome.  
The IDE development gets hindered because the autocompletion must be able  
to parse both D1/D2 and future DMD releases. And endless bug fixes.

An extendible while relatively more stable metadata file format may  
greatly ease IDE development.