Add optional support for using the system libicu

[Joe Darcy]

I don't think it is tenable to have long-term maintenance of two build 
systems. Any remaining blockers in the new build should be addressed so 
the old build can be put out to pasture.

-Joe

On 6/5/2013 1:50 PM, Phil Race wrote:
> Heavens no. Its a blessing. I sometimes do development work in 7 because
> I can't get the new build to work, or to work the way I want.
> I don't think I've ever gotten it to build on Windows.
> The old build saves me time, disk space and repo maintenance headaches.
>
> -phil.
>
> On 6/5/2013 1:40 PM, Alan Bateman wrote:
>> On 05/06/2013 19:02, Phil Race wrote:
>>>
>>> Yes, please support the old build system.
>> Is this really necessary? The old build is a tax and we really need 
>> it to die. In this case, it's a new feature and I don't see any point 
>> in anyone spending time adding this support to the old build.
>>
>> -Alan
>