core: move new object system to core module

this will allow a wider range of data structures (e.g. b_error, b_stream, b_stringstream) to make use
of the new object system, and other modules and library users can use the object system without
depending on the blue-object or blue-ds modules.

blue-ds will become a simple library of data structures (string, hashmap, etc), built on top of the
core object system.

CMakeLists.txt

@@ -9,7 +9,7 @@ set(CMAKE_C_EXTENSIONS OFF)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
-set(b_modules core ds object serial term cmd io compress)
+set(b_modules core ds serial term cmd io compress)
 
 set(b_system_name ${CMAKE_SYSTEM_NAME})
 string(TOLOWER ${b_system_name} b_system_name)