Changes that are done in this branch

 1. Merged the dmd stuff from phobos/internal and std/typeinfo into the tango/lib/compiler/dmd
      (dmd 2.006)

 2. object.di:
      added the aliases for string/wstring/dstring
      changed class fields from 'char[]' to 'string'
      add TypeInfo_Const, TypeInfo_Invariant
      add MemberInfo, MemberInfo_function, MemberInfo_field

 3. object.di Object:
      toUtf8 result type to string

 4. object.di ClassInfo
      add field 'xgetMembers'
      add meth 'getMembers'
      chg meth 'find' param to 'string'

 5. object.di TypeInfo
      chg meth getHash/equals/compare parameters to 'in'. Made the change in all derived classes.

 6. object.di Exception
      chg ctor arg to string

 7. lib/common/tango/core/Exception.d
      chg all ctors to string args
      add HiddenFuncException
      add onHiddenFuncError callback

 8. tango/lib/common/tango posix.mak/win32.mak
      chg to compile without '-v1'

 9. Global changes to invariant syntax
      chg the 'invariant' declaration to 'invariant()'

 10. lib/compiler/dmd/typeinfo
      chg global toUtf8 and merge with phobos changes

 11. lib/compiler/dmain2.d
      add _d_hidden_func which does call onHiddenFuncError

 12. lib/compiler/genobj.d
      chg like object.di

 13. Introduced Immutable and mutable string
    alias const(char)[]  Cutf8;
    alias const(wchar)[] Cutf16;
    alias const(dchar)[] Cutf32;
    alias char[] Mutf8;...

 14. Changed many method signatures, that seem to not never modify their arguments.

 15. added the _d_allocmemory from the DMD2.007 changed
     The tango c-main already used the "take address of local function" which triggers
     the heap stack frame. This caused a malloc call befor the GC is initialized.
     Because of that, the c-main was changed so that is does not trigger the _d_allocmemory.


    Frank <keinfarbton@googlemail.com>