parity-version pr reopen (#7136)

* parity-version module split from util

removed unused util deps and features

trigger buildbot again

only kvdb links rocksdb

snappy linker issues

* rm snappy

* fixed old version imports

parity/cli/usage.rs

@@ -152,7 +152,7 @@ macro_rules! usage {
 		use toml;
 		use std::{fs, io, process};
 		use std::io::{Read, Write};
-		use util::version;
+		use parity_version::version;
 		use clap::{Arg, App, SubCommand, AppSettings, ArgMatches as ClapArgMatches, Error as ClapError, ErrorKind as ClapErrorKind};
 		use helpers::replace_home;
 		use std::ffi::OsStr;