Article about service types.
Add a note about fail jsbin
Some grammar fixes as well as some subjective changes

I was going to give a copy of this article to my group to help speed up our mobile webpage, but I made a few changes first to match my group's style guildlines, etc. I thought I'd share the changes.
Kept $watch in the singular throughout

Also, added a space after "151"
Merge pull request #7 from RyanMarcus/master

Some grammar fixes as well as some subjective changes
updated factory documentation
Merge pull request #8 from callmehiphop/patch-1

updated factory documentation
Fix a typo in the article