Merge branch 'chat' into 'master'

Cargo.lock

Cargo.toml

src/buffered_display.rs

src/controller.rs

src/gui/button.rs

src/gui/chat.rs

src/gui/chat_list.rs

src/gui/contact_view.rs

src/gui/mod.rs

src/gui/selector.rs

src/gui/status.rs

src/gui/textbox.rs

src/main.rs

src/message.rs