minor tweaks to top-level CMake file.
minor tweaks to top-level CMake file.

dictoon/appleseed,dictoon/appleseed,gospodnetic/appleseed,docwhite/appleseed,aiivashchenko/appleseed,luisbarrancos/appleseed,est77/appleseed,aytekaman/appleseed,appleseedhq/appleseed,luisbarrancos/appleseed,Vertexwahn/appleseed,Biart95/appleseed,aytekaman/appleseed,est77/appleseed,dictoon/appleseed,Aakash1312/appleseed,aytekaman/appleseed,pjessesco/appleseed,glebmish/appleseed,pjessesco/appleseed,dictoon/appleseed,aytekaman/appleseed,glebmish/appleseed,Biart95/appleseed,Vertexwahn/appleseed,docwhite/appleseed,docwhite/appleseed,luisbarrancos/appleseed,Aakash1312/appleseed,luisbarrancos/appleseed,Biart95/appleseed,docwhite/appleseed,dictoon/appleseed,glebmish/appleseed,gospodnetic/appleseed,appleseedhq/appleseed,aytekaman/appleseed,est77/appleseed,Biart95/appleseed,Aakash1312/appleseed,docwhite/appleseed,aiivashchenko/appleseed,pjessesco/appleseed,luisbarrancos/appleseed,gospodnetic/appleseed,Vertexwahn/appleseed,Aakash1312/appleseed,est77/appleseed,Biart95/appleseed,glebmish/appleseed,Vertexwahn/appleseed,est77/appleseed,gospodnetic/appleseed,glebmish/appleseed,aiivashchenko/appleseed,Aakash1312/appleseed,gospodnetic/appleseed,appleseedhq/appleseed,aiivashchenko/appleseed,appleseedhq/appleseed,pjessesco/appleseed,appleseedhq/appleseed,pjessesco/appleseed,aiivashchenko/appleseed,Vertexwahn/appleseed