Elementary map: elm_map source patch

Elementary map: elm_map source patch

i removed all custom enum & url callback of elm_map.
(ELM_MAP_SOURCE_CUSTOM_1, ELM_MAP_SOURCE_CUSTOM_2, ..., _custom1_url_cb, _custom2_url_cb, ... etc)
instead of those, i made sources list.
changed APIs are almost internal APIs...
but some APIs were changed for intuitive usage of map source.
user can make map module instead of setting custom APIs.

another change is "elm_module -> eina_module".
the reason of this change, is that elm_module uses environment value (i.e getenv, setenv.. ELM_MODULES)
i don't want to have a environment value dependency.

git-svn-id: https://svn.enlightenment.org/svn/e/trunk/elementary@59184 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33