New rule. Titles and posts should be more descriptive.

Often, it'll be unclear why someone posts, or they'll post with a title only saying "help," so you need to click to see what is being posted about. I considered deleting these under rule 5, but thought it'd be better to make a new rule, so that it's more clear why posts are being deleted. I am also adding it so that I can make sure a user isn't just posting after their first failed attempt, or so I can see what posts fall under common questions without clicking on it first. Also, if you haven't, please check out the other rules as well.