[fix] wrt js_of_ocaml

[fix] to be merge
[enhance] native version of syntax extension

[fix] syntax extention native

Conflicts:
	local/etc/eliom.conf
[hack] rm confict
[enhance] Ev.on(error/abort)
[fix] attrib case
mkdir -p
[enhance] check native dynlink support before building native syntax
Type the return type of services
Update the testsuite and the distillery with services typing
Update the doc against services typing
clean wrt js_of_ocaml
missing stubs
detect available db-engine
Merge remote-tracking branch 'up/master' into merge
update depend
More of manip
revert update depend
eliom_bus now start at site initialization
Deps: deriving-ocsigen -> deriving
Merge pull request #16 from besport/deriving

Deps: deriving-ocsigen -> deriving