Update README instructions

+ Fix incorrect library name for `algorithms/trees/BST` example
+ Update root CMakeLists.txt for major directories to set binary path
+ Add instructions to install CMake LTS with pip

cpp/graphics/opengl-cmake/CMakeLists.txt

@@ -24,7 +24,6 @@ if (OPENGL_FOUND)
   # Link opengl-test executable to OpenGL
   target_include_directories(lib-opengl-test PUBLIC ${OPENGL_INCLUDE_DIR})
   target_link_libraries(lib-opengl-test PUBLIC ${OPENGL_LIBRARIES})
-
 else()
   message(
       "Error: CMake was unable to find the OpenGL package\n"
@@ -38,7 +37,6 @@ if (GLUT_FOUND)
   # Link lib-opengl-test executable to GLUT
   target_include_directories(lib-opengl-test PUBLIC ${GLUT_INCLUDE_DIR})
   target_link_libraries(lib-opengl-test PUBLIC ${GLUT_LIBRARIES})
-
 else()
   message(
       "Error: CMake was unable to find the GLUT package\n"