Update to latest master Rocket version

[thanadolps]

Because of some change in rocket's master branch, currently this library cannot be use with rocket's master branch. This PR update the library to be compatible with latest rocket's master branch.

Changes

• Rocket phase have changed to Build -> Ignite -> Orbit
  • rocket::ignite()(which was previously the first phase) are now replaced by rocket::build()
  • rocket::Rocket now have one type parameter signifying the phase
• Replace fairing's on_attach() with on_ignite()
  • some of fairing's test are change to test when rocket are on ignite phase.
• Replace rocket::handler with rocket::route
  • rocket::route::Handler don't have the same lifetime signature as (now removed)rocket::handler::Handler
• rocket::log_ are removed
• Replace rocket::Request::get_param() with rocket::Request::param()
• Multiple segment now matched empty path (previously the route "/<p..>" won't match "/" but now it will). this change cause the routes returned from catch_all_options_routes() to collide so I remove the empty route.

[lawliet89]

Could you update Cargo.toml to lock it to a specific commit instead? Less likely to break.

[thanadolps]

Done

[lawliet89]

Thanks for your contribution!