Inherit PlatformToolset from the project configuration. This allow the
project to configure PlatformToolset, and aligns the Release x64 build
with other build types.
Fixes#1430
Add mbedTLS.vcxproj to the VS2010 application template so that the next
time we auto-generate the application project files, the
LinkLibraryDependencies for mbedTLS.vcxproj are maintained.
Fixes#1347
Adds interim directories to the Visual Studio project files to avoid warning
MSB8028 in Visual Studio 2015, where shared directories of intermediate files
between project files generate the warning.
