Translate #17

First pass at a translation for #17  “Bower: зачем фронтенду нужен менеджер пакетов”

A few notes:
- I made some small changes to sentence structure, syntax (using m-dashes and commas) for clarity
- I also made some small language choices where appropriate to add clarity
- I did not wrap the lines to 110 yet, because it makes editing difficult
- I also didn't add a thumbnail, I leave that to your judgement

Let me know what you think.