Further clarify recommended usage
Further clarify recommended usage

Pushed the section on hard dependency installation to the bottom of the usage methods to further discourage its use. Also included a note in that section warning that it is not the recommended method. Lastly, changed what was said in the opening paragraph of the Usage section to reflect the multitude of options.
graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust