Update using.rst to 0.6.1

doc/source/users_guide/using.rst

@@ -7,7 +7,7 @@ Using *h5cpp* with :program:`cmake`
 
 *h5cpp* not only uses *CMake* as a build system but also provides 
 a *CMake* package which makes using the library with *CMake* quite simple. 
-The *CMake* package is installed below :file:`PREFIX/lib/cmake/h5cpp-0.6.0`
+The *CMake* package is installed below :file:`PREFIX/lib/cmake/h5cpp-0.6.1`
 where :envvar:`PREFIX` expands to the installation prefix used in the 
 inital cmake call of the installation procedure.   
 
@@ -41,7 +41,7 @@ the following :file:`CMakeLists.txt` fiel is sufficient
    cmake_minimum_required(VERSION 3.5.0)
    project(h5cpp_test 
            LANGUAGES C CXX
-           VERSION 0.6.0)
+           VERSION 0.6.1)
    set(CMAKE_CXX_STANDARD 11)
    
    find_package(h5cpp REQUIRED)
@@ -56,7 +56,7 @@ You can build the code with
 
    h5cpp_test:$ mkdir build
    h5cpp_test:$ cd build
-   h5cpp_test:$ cmake -Dh5cpp_DIR=<INSTALLPREFIX>/lib/cmake/h5cpp-0.6.0 ../
+   h5cpp_test:$ cmake -Dh5cpp_DIR=<INSTALLPREFIX>/lib/cmake/h5cpp-0.6.1 ../
    h5cpp_test:$ make
 
 The cmake variable :envvar:`h5cpp_DIR` tells :program:`cmake` where to look