Added ctest so we now have a 'make test' target for running tests.

CMakeLists.txt

@@ -23,13 +23,13 @@ target_include_directories(
 
 set(HEADER_BASE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 
+include(CTest)
 if(SPDLOG_BUILD_EXAMPLES)
-  enable_testing()
-  add_subdirectory(example)
+    add_subdirectory(example)
 endif()
 
 if(SPDLOG_BUILD_TESTS)
-	add_subdirectory(tests)
+    add_subdirectory(tests)
 endif()
 
 ### Install ###