New compiler changes quite some stuff:

* Compiler detection done based on different registry key
* .NET SDK detection done based on different registry key
* Msbuild installation directory changed
* Merge modules installation directory changed
* SDK number in registry doesn't match the directory name:
  (registry key: 10.0.14393, directory name: 10.0.14393.0)
* Compiler, include and library location directories changed
* Architecture specific directory changed: x64 instead of amd64
* Compiler own include directory must be added with -I option
* To force usage of SDK 10 (8.1 is selected per default) new
  switch WindowsTargetPlatformVersion is passed to msbuild, to
  avoid patching VC project files with this line:
<WindowsTargetPlatformVersion><SDK>/WindowsTargetPlatformVersion>

Known issues:

* Firebird is broken: http://paste.openstack.org/show/594333

Change-Id: I148d7932aff43bbbd07bd493504df974726234c2
Reviewed-on: https://gerrit.libreoffice.org/31279Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: David Ostrovsky <david@ostrovsky.org>