Implement json pointer following the json pointer syntax, with type Option<&toml::Value>.
Overload / as path operator to point into a node in json tree, as well as some other
meaningfull operator overload.
# This sample.tmol is used by example/tests with `include_str` macro.ip="127.0.0.1"[host]ip="127.0.1.1"port=8080protocol=["tcp","udp","mmp"][[service]]name="serv_1"desc="first server"[[service]]name="serv_2"desc="another server"[misc]int=1234float=3.14bool=true