Moar tweaks

Attempts to be more specific and consistent with terminology
No modules for mixins

I don't think this is something we should be encouraging
Equality
Variable scope and closure
Update javascript-the-language.md
Derp, removed objectives that aren't part of the language
More on equality
Notes on Evil
Hoisting
Prototypes
Limited line length to 80cols, + other formatting, no content changes
Merge pull request #40 from dbc-curriculum/js-lang-objectives-updates

Js lang objectives updates