added challenge info to readme for week 4
changed week and unit
modified instructions
removed unnecessary readme files
changed to competencies and releases
modified instructions with releases and made DRY
changed run tests instructions
changed run tests instructions
added template
added solution and directions
removed option to work with others
moved to release format
modified to release format
fixed release formatting
fixed release formatting
changed format of release directions
included info that cipher is a pair challenge
changed format of release directions
added technical and cultural blogs
added unit goal reminder