Simplified layout in CppCheck test directory, removed several redundant files (.sln)
Renamed some CppCheck tests for better self-description. Added CppCheck test project to test for missing preprocessor def/include dirs tags in project files. These tags are usually contained in a ItemDefinitionGroup tag, but this tag may sometimes be empty.
Updated project parser to cope with empty ItemDefinitionGroup tag in
project files. Added corresponding test.
Updated checkstyle to exclude more CppCheck test projects from style
checking
Merge branch 'master' of https://github.com/andi12/msbuild-maven-plugin
Restored test-msbuild.cmd that was wrongly deleted on a previous commit!