Add Project controller

After login user traps to Project listing page where he can manage his projects or create new.
Not authenticated users can't view any of projects.
add user to project.show project participants
projects contoller
fix
project controller test added
Remove test folder
Add capybara for feature testing
Add sing up test
Add langing page test
Add more tests and refactoring
Merge pull request #5 from RailsMafia/feature/projects

Implemented projects part