Added missing Revision macro file from chamcham branch.

moose-core/cmake_modules/GetRevision.cmake

+CMAKE_MINIMUM_REQUIRED(VERSION 2.6.3)
+
+MACRO(NOW RESULT)
+  IF(CMAKE_VERSION VERSION_GREATER "2.8.10")
+    STRING(TIMESTAMP ${RESULT} "%Y%m%d")
+  ELSE()
+    IF(WIN32)
+      EXECUTE_PROCESS(COMMAND "wmic" "os" "get" "localdatetime" OUTPUT_VARIABLE DATETIME)
+      IF(NOT DATETIME MATCHES "ERROR")
+        STRING(REGEX REPLACE ".*\n([0-9][0-9][0-9][0-9])([0-9][0-9])([0-9][0-9])([0-9][0-9])([0-9][0-9])([0-9][0-9]).*" "\\1-\\2-\\3 \\4:\\5:\\6" ${RESULT} "${DATETIME}")
+      ENDIF()
+    ELSEIF(UNIX)
+      EXECUTE_PROCESS(COMMAND "date" "+%Y%m%d" OUTPUT_VARIABLE DATETIME)
+      STRING(REGEX REPLACE "([0-9: -]+).*" "\\1" ${RESULT} "${DATETIME}")
+    ELSE()
+      MESSAGE(SEND_ERROR "date not implemented")
+      SET(${RESULT} "00000000")
+    ENDIF()
+  ENDIF()
+ENDMACRO()