added instructions and week outline
finished submission list
fixed link for third challenge
fixing checkboxes
deleted attempt to create checkbox
deleted unnecessary description
updated labs with navigation links
added headings
added section header
fixed link
added readme
added resources to readme
clarified instrucitons
clarified instrucitons
added link to intro lab
updated challenge with more directions
updated challenge
updated challenge directions for clarity
updated challenge direction
modified challenge instructions - removed review others' section