docs: rename tendermint-core to system (#6515)

docs/introduction/install.md

@@ -8,6 +8,14 @@ order: 3
 
 To download pre-built binaries, see the [releases page](https://github.com/tendermint/tendermint/releases).
 
+## Using Homebrew
+
+You can also install the Tendermint binary by simply using homebrew,
+
+```
+brew install tendermint
+```
+
 ## From Source
 
 You'll need `go` [installed](https://golang.org/doc/install) and the required
@@ -18,14 +26,14 @@ echo export GOPATH=\"\$HOME/go\" >> ~/.bash_profile
 echo export PATH=\"\$PATH:\$GOPATH/bin\" >> ~/.bash_profile
 ```
 
-### Get Source Code
+Get the source code:
 
 ```sh
 git clone https://github.com/tendermint/tendermint.git
 cd tendermint
 ```
 
-### Compile
+Then run:
 
 ```sh
 make install

docs/introduction/quick-start.md

@@ -7,27 +7,8 @@ order: 2
 ## Overview
 
 This is a quick start guide. If you have a vague idea about how Tendermint
-works and want to get started right away, continue.
-
-## Install
-
-### Quick Install
-
-To quickly get Tendermint installed on a fresh
-Ubuntu 16.04 machine, use [this script](https://git.io/fFfOR).
-
-> :warning: Do not copy scripts to run on your machine without knowing what they do.
-
-```sh
-curl -L https://git.io/fFfOR | bash
-source ~/.profile
-```
-
-The script is also used to facilitate cluster deployment below.
-
-### Manual Install
-
-For manual installation, see the [install instructions](install.md)
+works and want to get started right away, continue. Make sure you've installed the binary.
+Check out [install](./install.md) if you haven't.
 
 ## Initialization