Update how-to-export-cpp-library entry (onqtam#26)

Update `[how-to-export-cpp-library](https://github.com/robotology/how-to-export-cpp-library)` entry under `Examples/Templates` section as a follow-up of its latest release.

README.md

@@ -156,7 +156,7 @@ These provide a wide range of functionality - from dealing with compiler flags t
 * [cpp_project_template](https://github.com/duckie/cpp_project_template) - Simple template to start quickly a C++ project managed by CMake. [```[MIT]```][MIT]
 * [cpp-boilerplate](https://github.com/Lectem/cpp-boilerplate) - Template that aims to be a reference for modern CMake and CI. [```[MIT]```][MIT]
 * [ci_helloworld](https://github.com/ainfosec/ci_helloworld) - A simple example of how to setup a complete CI environment for C and C++. [```[MIT]```][MIT]
-* [how-to-export-cpp-library](https://github.com/robotology/how-to-export-cpp-library) - An OS-agnostic C++ library template sporting ctest and CI support, written in plain CMake with line-by-line guiding comments. [```[MIT]```][MIT]
+* [how-to-export-cpp-library](https://github.com/robotology/how-to-export-cpp-library) - An OS-agnostic template project for exporting either shared, static or header-only C++ library, sporting ctest and CI support, written in plain CMake with line-by-line tutorial comments. [```[MIT]```][MIT]
 * [ModernCppCI](https://github.com/LearningByExample/ModernCppCI) - An example of doing a Modern C++ project with CI (although it uses non-modern CMake like ```include_directories()```). [```[MIT]```][MIT]
 * [modern-cmake-sample](https://github.com/pabloariasal/modern-cmake-sample) - Best practices and proper usage of CMake by using targets. ```[NO LICENSE]```
 * [CMakeInstallExample](https://github.com/DeveloperPaul123/CMakeInstallExample) - Installation example for a C++ project (Windows) with Cmake. ```[NO LICENSE]```