added imgs directory and week 8 readme
added gradebook challenge
filled in template
changed to weeks 8 and 9
added challenge drafts
modified challenge structure
removed github
added better install git link
small wording tweak
added more challenges
added new challenges
added SQL challenges
added additional curriculum
modified readme
fixed broken links
trying to fix apply.devbootcamp.com
trying to fix apply.devbootcamp.com
fixed apply.devbootcamp.com link
fixed links
fixed formatting