Package versions without Bootstrap glyphicons & without any icons

Made this optional in light of #292 

☄
How in the world did you catch this typo so quickly?

Anyway, it happened because [the WebStorm team at Jetbrains is a bunch of stubborn pigheads](https://youtrack.jetbrains.com/issue/WI-1398) and I had to edit the file in some shitty terminal editor without spell checking. :)