Inject content script into more pages of tops.

Videos, videos (48h), movies, TV shows, HD movies, HD TV shows.

Partially solves #4.
Strict mode.
Updated readme.
Added Code Climate badge to the readme.
Fixed style issues (Code Climate).
Code style.
Renamed js.js to app.js.
Refactored entry script.
Refactor (split the entry script).
(reword) Correct loading of the content scripts.
logging...
Revert "logging..."

This reverts commit 16d9a2cfa4e00760028b8a1b2029c972368691c4.