Some advice about druntime.

[Yonggang Luo]

This is care about druntime.
The trunk version is 40 
First, in file root/trunk/import/core/bitmanip.di, 
The 8th line of this file is 
"module bitmanip;" I don't know if it's must be change to module "core.bitmanip" 

And I think the files 
exception.d 
memory.d 
runtime.d 
thread.d 
also to be place in the floder root/trunk/import/core/ will be better. (Just a advice) 

And I am curios the three files in the folder root/trunk/import/std 
Is this possible to migrate these three files to folder root/trunk/import/core/ ? 
It's should be more meaningful, means these three file is not a general library, It's just used by the compiler, OR 
The compiler intrinsic functions, so it belong to 'core', (Just a advice, maybe it's impossible); 

It's possible be a good idea is we migrate the file object.di to the folder root/trunk/import/core/  
so we have the 

module core.object 
module core.bitmanip 
module core.exception 
module core.memory 
module core.runtime 
module core.thread 

module core.intrinsic for replacement of std.intrinsic  


and we have 
module core.stdc.* 
module core.sys.windows.* 
module core.sys.linux.* 
module core.sys.posix.* 

and for c 
we have a special module 
module core.stdc.stdarg; for replacement for std.stdarg and std.c.stdarg. 

And I don't know why we need two stdarg file? 
one is std.stdarg, and the other one is std.c.stdarg? 
It's so strange. but the content of these two file is the same. 

So it's should be file is we merge these two file.