One more README update

README.md

@@ -24,4 +24,11 @@ See the classroom instruction and code comments for more details on each of thes
 * gcc/g++ >= 5.4
   * Linux: gcc / g++ is installed by default on most Linux distros
   * Mac: same deal as make - [install Xcode command line tools](https://developer.apple.com/xcode/features/)
-  * Windows: recommend using [MinGW](http://www.mingw.org/)
+  * Windows: recommend using [MinGW](http://www.mingw.org/)
+
+## Basic Build Instructions
+
+1. Clone this repo.
+2. Make a build directory in the top level directory: `mkdir build && cd build`
+3. Compile: `cmake .. && make`
+4. Run it: `./2D_feature_tracking`.