Added README.md

Author: harrism

posts/unified-memory/README.md

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+Unified Memory Example
+======================
+
+This is an example of using Unified Memory from CUDACasts Episode #X. 
+
+There are four examples
+* dataElem.cu: original simple data structure example in vanilla CUDA C
+* dataElem_um.cu: modified example that uses Unified Memory to simplify data allocation.
+* dataElem_um_c++_1.cu: A C++ example that shows how to overload new and delete to use cudaMallocManaged().
+* dataElem_um_c++_2.cu: A more complete C++ example that creates a managed String class and uses it to simplify the unified memory management inside our data structure.
+
+