Merge topic 'src-named-for-config'

70c85c1d Tests: Add case for source files named with CONFIG genex
3b547e2e VS: Simplify logic adding source file C/C++ language flag to MSVC
27ead9d4 VS: Compute managed type from an existing configuration
1222327c VS: Write custom commands for sources from all configurations
65fe58a4 cmVisualStudio10TargetGenerator: Adopt Windows Store and Phone infrastructure
3fa3b7a4 cmGeneratorTarget: Remove default config from Get* methods
d6a88d21 cmTarget: Replace "perConfig" constructor boolean with enum

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4761