Added README

Author: smessmer

git-version-builder/LICENSE LICENSE

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+# git-version
+This can be incorporated into your build process. If done so, it creates a source file containing git version information, which can then be used by your application.
+
+
+== Use with biicode ==
+Add the following to your CMakeLists.txt
+
+    INCLUDE(messmer/gitversion/cmake)
+    GIT_VERSION_INIT()
+
+Then, you can write in your source file:
+
+    #include <messmer/gitversion/gitversion.h>
+    cout << gitversion::VERSION.major() << endl;
+    cout << gitversion::VERSION.toString() << endl;
+    cout << gitversion::VERSION.is_stable() << endl;
+    cout << gitversion::VERSION.gitCommitId() << endl;
+    // ... (see src/Version.h for more functions)
+
+
+== Use manually ==
+
+There is a python script in the git-version-builder directory.
+To generate a version.h file containing C++ version information, call
+
+    python git-version-builder --lang cpp version.h