Use download method which works with proxies which require authentication

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Support both MSVC 2012 v110_xp and MSVC 2013 v120_xp toolsets

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Signed-off-by: Sven Strickroth <email@cs-ware.de>
Remove _ProjectFileVersion from project files

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>