The manifest syntax stays exactly the same, including 0 and 1
integers to denote boolean values (this is done for ease of porting
and can be fixed in future commits). The only visible change is
surrounding strings in the manifest with quotes (requirement of
TOML). All manifests and Makefiles of our tests and example apps are
ported to the new TOML syntax. Documentation is updated.
Also move parse_size_str() to a more appropriate atoi.c file.
This is in preparation for replacing the old ad-hoc manifest
syntax with the TOML syntax.