Do not generate documentation by default

Flip option by default as with EigenPy, Pinocchio

CMakeLists.txt

@@ -22,6 +22,7 @@ set(PROJECT_DESCRIPTION
 set(PROJECT_URL "https://github.com/${PROJECT_ORG}/${PROJECT_NAME}")
 
 # Project options
+option(INSTALL_DOCUMENTATION "Build and install the documentation" OFF)
 option(BUILD_PYTHON_INTERFACE "Build the python bindings" ON)
 option(INSTALL_PYTHON_INTERFACE_ONLY "Install *ONLY* the python bindings" OFF)
 option(SUFFIX_SO_VERSION "Suffix library name with its version" ON)