Issues in monero downloading code from README.md
from README.md:

```
# Download latest Monero release
curl https://downloads.getmonero.org/cli/monero-linux-x64-v0.10.2.1.tar.bz2 > /tmp/monero.tar.bz2
# Validate file
echo "9edba6ca91c35c6c2eb6816f9342931c88648de5beb471943ea63d0b16c9a2e4 /tmp/monero.tar.bz2" | sha256sum -c
# Extract binanries
tar -xf /tmp/monero.tar.bz2 -C /tmp && mv /tmp/monero-v0.10.2.1/* /usr/local/bin/
```

1. use --location argument for curl instead of >
2. use enviroment variable to store version (such as '0.10.2.1') and use it instead of hardcoded value.
3. don't use static filename in /tmp , see: "Safely Creating Temporary Files in Shell Scripts"
http://www.linuxsecurity.com/content/view/115462/151/
use mktemp command instead for temp file/dir.
4. remove the archive file after extract operation.
