Reorganize cmake files into dedicated cmake directory

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 664a649..0178c3d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,8 @@
 
 enable_testing()
 
-include(scripts/GetGitRevisionDescription.cmake)
+include(cmake/GetGitRevisionDescription.cmake)
+include(cmake/version.cmake)
 get_property(LIB64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
 if(LIB64)
   set(LIBSUFFIX 64)
@@ -45,7 +46,6 @@
 set(CMAKE_CXX_FLAGS "-std=c++11 -Wall")
 endif()
 
-add_subdirectory(scripts)
 add_subdirectory(examples)
 add_subdirectory(src)
 add_subdirectory(tests)