Make M*LIB stricter for INIT_MOVE operator:

* either the default INIT_MOVE operator works ('=')
* either an INIT_MOVE method is defined
* or it is disabled.
As a consequence, fix usage of testobj_t and mpz_t in the repository

The emulation layer of INIT_MOVE using INIT_SET+CLEAR is removed:
it wasn't working correctly with the local memory context
(INIT_MOVE doesn't need any local memory context to work,
 whereas INIT_SET/CLEAR does)
Remove macro M_DO_INIT_MOVE as it is now useless and uses M_CALL_INIT_MOVE.

The INIT_MOVE default method no longer sets the old 'src' to '0':
it was useless (it doesn't catch any error) and complicates compiler parsing.

Fix POD & A1 & CSTR & classic oplists definition (missing INIT_MOVE operators).

doc/ISSUES.org

@@ -1,7 +1,7 @@
 *Long term issues*
 ==========================================================
 
-* TODO #34 : Pass old size arguments to memory allocator        :ENHANCEMENT:
+* DONE #34 : Pass old size arguments to memory allocator        :ENHANCEMENT:
 
 ** State
 
@@ -53,7 +53,7 @@ function due to the copy of the object one per one. Each copied sub object
 may throw an exception, so we always need to have the container in a correct
 state so that it can be cleanup.
 
-* TODO #32 : User specialization fields in the container        :ENHANCEMENT:
+* DONE #32 : User specialization fields in the container        :ENHANCEMENT:
 ** State
 
 Some methods of a contained object may need to have some options that 
@@ -452,7 +452,7 @@ as DPRIORITY_QUEUE_DEF ?
 NOTE: Needs for such container?
 On hold until a user needs it.
 
-* TODO #23 : Strict MOVE semantic to clarify                    :ENHANCEMENT:
+* DONE #23 : Strict MOVE semantic to clarify                    :ENHANCEMENT:
 
 ** State