fix: README -> README.md

ta6ob/lz4/lib/dll/example/README.md

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+LZ4 Windows binary package
+====================================
+
+#### The package contents
+
+- `lz4.exe`                  : Command Line Utility, supporting gzip-like arguments
+- `dll\liblz4.dll`           : The DLL of LZ4 library
+- `dll\liblz4.lib`           : The import library of LZ4 library for Visual C++
+- `example\`                 : The example of usage of LZ4 library
+- `include\`                 : Header files required with LZ4 library
+- `static\liblz4_static.lib` : The static LZ4 library
+
+
+#### Usage of Command Line Interface
+
+Command Line Interface (CLI) supports gzip-like arguments.
+By default CLI takes an input file and compresses it to an output file:
+```
+    Usage: lz4 [arg] [input] [output]
+```
+The full list of commands for CLI can be obtained with `-h` or `-H`. The ratio can
+be improved with commands from `-3` to `-16` but higher levels also have slower
+compression. CLI includes in-memory compression benchmark module with compression
+levels starting from `-b` and ending with `-e` with iteration time of `-i` seconds.
+CLI supports aggregation of parameters i.e. `-b1`, `-e18`, and `-i1` can be joined
+into `-b1e18i1`.
+
+
+#### The example of usage of static and dynamic LZ4 libraries with gcc/MinGW
+
+Use `cd example` and `make` to build `fullbench-dll` and `fullbench-lib`.
+`fullbench-dll` uses a dynamic LZ4 library from the `dll` directory.
+`fullbench-lib` uses a static LZ4 library from the `lib` directory.
+
+
+#### Using LZ4 DLL with gcc/MinGW
+
+The header files from `include\` and the dynamic library `dll\liblz4.dll`
+are required to compile a project using gcc/MinGW.
+The dynamic library has to be added to linking options.
+It means that if a project that uses LZ4 consists of a single `test-dll.c`
+file it should be linked with `dll\liblz4.dll`. For example:
+```
+    gcc $(CFLAGS) -Iinclude\ test-dll.c -o test-dll dll\liblz4.dll
+```
+The compiled executable will require LZ4 DLL which is available at `dll\liblz4.dll`.
+
+
+#### The example of usage of static and dynamic LZ4 libraries with Visual C++
+
+Open `example\fullbench-dll.sln` to compile `fullbench-dll` that uses a
+dynamic LZ4 library from the `dll` directory. The solution works with Visual C++
+2010 or newer. When one will open the solution with Visual C++ newer than 2010
+then the solution will upgraded to the current version.
+
+
+#### Using LZ4 DLL with Visual C++
+
+The header files from `include\` and the import library `dll\liblz4.lib`
+are required to compile a project using Visual C++.
+
+1. The header files should be added to `Additional Include Directories` that can
+   be found in project properties `C/C++` then `General`.
+2. The import library has to be added to `Additional Dependencies` that can
+   be found in project properties `Linker` then `Input`.
+   If one will provide only the name `liblz4.lib` without a full path to the library
+   the directory has to be added to `Linker\General\Additional Library Directories`.
+
+The compiled executable will require LZ4 DLL which is available at `dll\liblz4.dll`.