Update README.md to include instructions for tests, coverage, and doxygen

README.md

@@ -120,3 +120,38 @@ Instructions for RELEASE build
 
 [cmake]: http://www.cmake.org/
 [ninja]: http://martine.github.io/ninja/
+
+Instructions for Testing and Measuring Code Coverage
+====================================================
+
+To measure [code coverage][cover], compile TESTCOV build using g++:
+
+    mkdir -p build/testcov
+    cd build/testcov
+    cmake -DCMAKE_BUILD_TYPE=TESTCOV -DCMAKE_CXX_COMPILER=g++-4.8 -G Ninja ../../src
+    ninja
+
+and run test cases:
+
+    ctest
+
+and collect coverage data using [lcov][lcov] and [gcov][gcov]:
+
+    lcov -c -b ../../src -d . -o cov.info --no-external --gcov-tool gcov-4.8
+
+and generate HTML output:
+
+    genhtml cov.info --output-directory lcov
+
+Note: make sure that the version of ``gcov`` matches with the one of
+``g++``. Also try to use the latest ``lcov`` if you have a problem
+with the existing one.
+
+[gcov]: http://gcc.gnu.org/onlinedocs/gcc/Gcov.html
+[lcov]: http://ltp.sourceforge.net/coverage/lcov.php
+[cover]: https://dl.dropboxusercontent.com/u/203889738/lcov/index.html
+
+Instructions for Building Doxygen Documentation
+===============================================
+
+    doxygen src/Doxyfile