Use atexit to shutdown eo, evas and ecore modules

They already had a call to init in the module, thus there was a mismatch
not obvious to users.

efl/ecore/efl.ecore.pyx

@@ -246,11 +246,12 @@ Classes
 """
 
 from libc.stdint cimport uintptr_t
-import traceback
 from efl.eo cimport Eo, PY_REFCOUNT
 from efl.utils.conversions cimport _ctouni
 from cpython cimport Py_INCREF, Py_DECREF
 
+import traceback
+import atexit
 
 
 cdef Eina_Bool _ecore_task_cb(void *data) with gil:
@@ -342,6 +343,7 @@ include "efl.ecore_file_download.pxi"
 include "efl.ecore_file_monitor.pxi"
 
 init()
+atexit.register(shutdown)
 
 
 #---------------------------------------------------------------------------

efl/eo/efl.eo.pyx

@@ -55,6 +55,8 @@ cdef int PY_REFCOUNT(object o):
     cdef PyObject *obj = <PyObject *>o
     return obj.ob_refcnt
 
+import atexit
+
 ######################################################################
 
 def init():
@@ -66,6 +68,7 @@ def shutdown():
     return eo_shutdown()
 
 init()
+atexit.register(shutdown)
 
 def event_global_freeze_count_get():
     cdef int fcount = 0

efl/evas/efl.evas.pyx

@@ -965,6 +965,8 @@ from efl.utils.logger cimport add_logger
 
 cdef int PY_EFL_EVAS_LOG_DOMAIN = add_logger(__name__).eina_log_domain
 
+import atexit
+
 
 # TODO doc
 EVAS_HINT_FILL = -1.0
@@ -1189,3 +1191,4 @@ include "efl.evas_object_grid.pxi"
 
 
 init()
+atexit.register(shutdown)