Osiris 09d003aac0 Problem: Added "make clean" to Windows build scripts ...

Solution: Added ability to do equivalent of a "make clean" by executing:

O:\git\libzmq\builds\msvc\build>buildall.bat clean
Start Time: Fri 03/04/2016 14:33:56.50
Cleaning without libsodium
Cleaning ..\vs2013\libzmq.sln... ()
Platform=x86
Configuration=DynDebug
Configuration=DynRelease
Configuration=LtcgDebug
Configuration=LtcgRelease
Configuration=StaticDebug
Configuration=StaticRelease
Platform=x64
Configuration=DynDebug
Configuration=DynRelease
Configuration=LtcgDebug
Configuration=LtcgRelease
Configuration=StaticDebug
Configuration=StaticRelease
Cleaning complete: ..\vs2013\libzmq.sln

Stop  Time: Fri 03/04/2016 14:34:01.84
Start Time: Fri 03/04/2016 14:33:56.50

A clean takes ~5 secs to complete.

2016-03-05 04:37:01 -06:00

..

buildall.bat

Problem: Added "make clean" to Windows build scripts

2016-03-05 04:37:01 -06:00

buildbase.bat

Problem: Added "make clean" to Windows build scripts

2016-03-05 04:37:01 -06:00