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

dapps/src/handlers/content.rs

@@ -19,7 +19,7 @@
 use hyper::{self, mime, header};
 use hyper::StatusCode;
 
-use util::version;
+use parity_version::version;
 
 use handlers::add_security_headers;
 use Embeddable;