Fix syntax error in BoostTestTargets.cmake
Merge pull request #18 from PiQuer/master

make GetGitRevisionDescription.cmake aware of submodules
that have a .git file instead of a .git directory.
Merge pull request #17 from gunnarbeutner/patch-1

Fix syntax error in BoostTestTargets.cmake
Merge pull request #19 from PiQuer/master

use CMAKE_CURRENT_LISTDIR instead of CMAKE_SOURCE_DIR as GIT_PARENT