fixes post /projects route so users can add projects
WIP adding link validation
adds method to validate links. adds http if not included so links don't break
minor fix to project link tag
change version of ruby in gemfile because i don't want to update mine locally right now. selfish shellfish sorry
Merge branch 'master' into upload-new-projects-easier

Conflicts:
	app/controllers/index.rb
	app/models/project.rb

Resolved conflicts/
adds project image
adds validations for presence of all fields
dbc create in navbar links to home
Merge pull request #12 from jonathanpeterwu/upload-new-projects-easier

Let's make uploading projects nicer