Renamed _INCLUDE_DIR -> _INCLUDE_DIRS & _LIBRARY -> _LIBRARIES

cmake_modules/wolfIMUConfig.cmake

 #edit the following line to add the librarie's header files
 FIND_PATH(
-    wolfIMU_INCLUDE_DIR
+    wolfIMU_INCLUDE_DIRS
     NAMES IMU.found
     PATHS /usr/local/include/iri-algorithms/wolf/plugin_IMU)
-IF(wolfIMU_INCLUDE_DIR)
-  MESSAGE("Found wolf IMU include dirs: ${wolfIMU_INCLUDE_DIR}")
-ELSE(wolfIMU_INCLUDE_DIR)
+IF(wolfIMU_INCLUDE_DIRS)
+  MESSAGE("Found wolf IMU include dirs: ${wolfIMU_INCLUDE_DIRS}")
+ELSE(wolfIMU_INCLUDE_DIRS)
   MESSAGE("Couldn't find wolf IMU include dirs")
-ENDIF(wolfIMU_INCLUDE_DIR)
+ENDIF(wolfIMU_INCLUDE_DIRS)
 
 FIND_LIBRARY(
-    wolfIMU_LIBRARY
+    wolfIMU_LIBRARIES
     NAMES libwolfIMU.so libwolfIMU.dylib
     PATHS /usr/local/lib/iri-algorithms)
-IF(wolfIMU_LIBRARY)
-  MESSAGE("Found wolf IMU lib: ${wolfIMU_LIBRARY}")
-ELSE(wolfIMU_LIBRARY)
+IF(wolfIMU_LIBRARIES)
+  MESSAGE("Found wolf IMU lib: ${wolfIMU_LIBRARIES}")
+ELSE(wolfIMU_LIBRARIES)
   MESSAGE("Couldn't find wolf IMU lib")
-ENDIF(wolfIMU_LIBRARY)
+ENDIF(wolfIMU_LIBRARIES)
 
-IF (wolfIMU_INCLUDE_DIR AND wolfIMU_LIBRARY)
+IF (wolfIMU_INCLUDE_DIRS AND wolfIMU_LIBRARIES)
    SET(wolfIMU_FOUND TRUE)
- ELSE(wolfIMU_INCLUDE_DIR AND wolfIMU_LIBRARY)
+ ELSE(wolfIMU_INCLUDE_DIRS AND wolfIMU_LIBRARIES)
    set(wolfIMU_FOUND FALSE)
-ENDIF (wolfIMU_INCLUDE_DIR AND wolfIMU_LIBRARY)
+ENDIF (wolfIMU_INCLUDE_DIRS AND wolfIMU_LIBRARIES)
 
 IF (wolfIMU_FOUND)
    IF (NOT wolfIMU_FIND_QUIETLY)
-      MESSAGE(STATUS "Found wolf IMU: ${wolfIMU_LIBRARY}")
+      MESSAGE(STATUS "Found wolf IMU: ${wolfIMU_LIBRARIES}")
    ENDIF (NOT wolfIMU_FIND_QUIETLY)
 ELSE (wolfIMU_FOUND)
    IF (wolfIMU_FIND_REQUIRED)
@@ -38,7 +38,7 @@ ENDIF (wolfIMU_FOUND)
 
 macro(wolf_report_not_found REASON_MSG)
   set(wolfIMU_FOUND FALSE)
-  unset(wolfIMU_INCLUDE_DIR)
+  unset(wolfIMU_INCLUDE_DIRS)
   unset(wolfIMU_LIBRARIES)
 
   # Reset the CMake module path to its state when this script was called.