Example of using SharedLib in C#
set where OSX frameworks are with FRAMEWORKPATH

this allows setting an alternative path for frameworks, such as
libraries installed outside the system paths. For instance QT installed
via hombrew.
Merge pull request #225 from emoon/master

Example of using SharedLib in C#
Merge pull request #229 from uucidl/add-framework-path-variable

set where OSX frameworks are with FRAMEWORKPATH
Add subproject example.

Added example how to structure projects with libraries as subprojects
were the library also can have their own example and/or unittests.
Changed error message to be more specific

Also suggest possible workaround.
Merge pull request #236 from leidegre/patch-2

Changed missing VS error message to be more specific