fix typo in code, u for uu
working on mac instrs, completed more-concepts above
fixed my own week7.rst conflicts
Merge branch 'pip' of https://github.com/aerenchyma/runestone into pip
now up to date on assignments merge
added imgs, finished mac instrs, concepts
fix accidental deleted section, all set now
fix installation file fully -- accidents all fixed
release version of installation.rst
week8 assignment and toc