Update README.md

Author: vadimkantorov

README.md

@@ -53,7 +53,7 @@ Runnable examples are in ```examples/extract_motion_vectors.sh``` and ```example
 # Building from source
 **mpegflow** depends only on a recent FFmpeg, **vis** depends on FFmpeg, OpenCV and libpng. The tools are known to work with FFmpeg 2.7.2 and OpenCV 2.4.11. We strongly recommend using ```dependencies/install_ffmpeg_here_linux.sh``` and ```dependencies/install_opencv_here_linux.sh```, even if you already have the dependencies installed elsewhere. Once the dependencies are visible to g++, run ```make``` to build **mpegflow** and ```make vis``` to build **vis**.
 
-To build tools on Windows:
+To build the tools on Windows:
 
 1. Follow ```dependencies/install_dependencies_here_windows.txt```
 2. Fix OPENCV_DIR, FFMPEG_DIR, VC_VERSION, OPENCV_ARCH in Makefile.nmake if needed