Remove all empty path parts from the parsed url.
Trim only removes empty binaries at the end
Eg: elli_http:parse_path({abs_path, <<"//map//stuff.json">>})
now: {ok, {..., [<<"map">>,<<"stuff.json">>], ...}}.
previously: {ok, {..., [<<>>, <<"map">>,<<>>,<<"stuff.json">>], ...}}.
Code cleanup after e5a6f4d.
Merge pull request #72 from anha0825/trim_all_empty_path_parts

Remove all empty path parts from the parsed url.