Update project_backgrounds.md steps

Updated step 7 to look for id="hero" instead of classes. The site uses "hero" class for the hero image, but changes the other classes when the image changes, so "your-verse" class is no longer in use.
spelling fix
Please add my solution to html/css
Uploading my Etch-A-Sketch project

Uploading my finished project of the Javascript and JQuery mission :)

tnx,
Tom
Adding John Miller Euler solutions
Adding John Miller Euler solutions
Merge pull request #391 from jason-ellis/master

Update project_backgrounds.md step 7
Merge pull request #392 from betweenparentheses/patch-9

spelling fix
Merge pull request #393 from KevinMulhern/patch-1

Please add my solution to html/css
Merge pull request #394 from MrKindle85/patch-4

Uploading my Etch-A-Sketch project
Merge pull request #395 from johndrmiller/master

adding John Miller to submissions
merge
Project Submit

Here is my project. Thank you so much!
added Tictactoe solution
Adding Tommy Noe's Event Manager Solution
Heroku app names may not contain underscores

$ heroku rename my_cool_app
Renaming fierce-ravine-2915 to my_cool_app... failed
 !    Name must start with a letter and can only contain lowercase letters, numbers, and dashes.
Added student solution
Merge pull request #397 from emargetis/patch-1

Project Submit
Merge pull request #398 from betweenparentheses/patch-10

added Tictactoe solution
Merge pull request #400 from thomasjnoe/patch-10

Adding Tommy Noe's Event Manager Solution