normalize paths in CMAKE_PREFIX_PATH for proper comparison (#979)
normalize paths in CMAKE_PREFIX_PATH for proper comparison (#979)

* Insert current directory to CMAKE_PREFIX_PATH only when it doesn't exist (#8)

use '/' as separator

* add comment to explain why os.path.normpath is needed (#34)

* correct comment; remove use of os.path.normpath()

* normalize base_path instead of paths in CMAKE_PREfiX_PATH

ros/catkin,ros/catkin,ros/catkin