Fixes #1742
Fixes #2021

To better distinguish the deno_core crate from the executable deno,
which will now be called "the cli" internally.

This reverts commit e976b3e0.

There is nothing technically wrong with this commit, but it's adding
complexity to a big refactor (native ES modules #975). Since it's not
necessary and simply a philosophical preference, I will revert for now
and try to bring it back later.

Run with: cargo clippy
https://github.com/rust-lang-nursery/rust-clippy

So as not to conflict with http crate.

Fixes #857

By using the tokio default runtime.

This patch makes all of the ops thread safe.

Adds libdeno to JS globals to make for easier testing.

Preliminary work for #733.

And rename net.rs to http.rs

Share HTTP connection.

Adds hyper-rustls to the build.

Use ring for sha1 instead of "ssh1" crate.

Fixes #528.

Implement --reload

Integrate hyper errors into DenoError

In collaboration with Tommy Savaria <tommy.savaria@protonmail.ch>