add avatar holder images
add progress to header
Merge branch 'development' of github.com:lacostenycoder/Learn.R into progress_bar
Merge branch 'development' of github.com:lacostenycoder/Learn.R into development
add avatar to user signup and edit
update ERD
add refresh to code lesson page
Merge branch 'development' of github.com:lacostenycoder/Learn.R into development
pulles some music images for backgrounds