Reorganize Git install, setup, test-drive and daily-usage instruction. Avoids repetition as much as possible.
Merge branch 'master' into bernhard-DRY-git
add package update info to block000_r-rstudio-install
edit block001_git-install
edit git_clients
edit git_credentials
yaml and whitespace edits to git_introduceToGit
edit git_whereToFind
edit block005_first-use-git-rstudio
first attempt at the great renaming and relinking
second wave of link corrections
remove http://stat545-ubc.github.io from internal links
grep command helpful during renaming and relinking
Merge pull request #6 from STAT545-UBC/bernhard-DRY-git

Reorganize Git install, setup, test-drive and daily-usage instruction.