ARM support

[Dicebot]

There were people trying vibe.d on ARM/Linux here and there with 
several issues that may or may not be already fixed by 
LDC/GDC/vibe.d developers. One thread I have found:

http://forum.rejectedsoftware.com/groups/rejectedsoftware.vibed/thread/6048/

As far as I know it works in general but using any more complex 
projects like vibe.d is likely to trigger any hiding  issues in 
GDC/LDC so one needs to be ready to push through it for greater 
good.