naga v1.0

Naga is a terminal implementation of snake game. URL: http://github.com/anayjoshi/naga.
This is a first time addition of this project in homebrew. The project has existed for quite some time, the github repository was refurnished today.
**Case 1**

```ruby
def install
    scons "install", "install_path=#{bin}"
end
```
This passes `brew audit naga`, but does not install `naga` binary. It throws the output
```
==> Downloading http://github.com/anayjoshi/naga/archive/naga-v1.0.tar.gz
Already downloaded: /Library/Caches/Homebrew/naga-1.0.tar.gz
==> /usr/local/opt/scons/bin/scons install install_path=/usr/local/Cellar/naga/1.0/bin
  /usr/local/Cellar/naga/1.0: 3 files, 12K, built in 2 seconds
```

**Case 2**
 ```ruby
def install
    system "scons", "install", "install_path=#{bin}"
end
```
This fails `brew audit naga` saying

```
naga:
 * use "scons *args" instead of "system 'scons', *args"
```

but installs `naga` binary correctly, saying

```
==> Downloading http://github.com/anayjoshi/naga/archive/naga-v1.0.tar.gz
Already downloaded: /Library/Caches/Homebrew/naga-1.0.tar.gz
==> scons install install_path=/usr/local/Cellar/naga/1.0/bin
  /usr/local/Cellar/naga/1.0: 4 files, 28K, built in 2 seconds
```