feat(README): add docs on the extended format
Merge pull request #48 from philips/add-extended-docs

feat(README): add docs on the extended format
fix(commands/*dir): remove bumpy caps from updatedir and setdir

Everything else in this tool uses lower case. Lower case these two
commands too.
Merge pull request #49 from philips/remove-bumpy-case

fix(commands/*dir): remove bumpy caps from updatedir and setdir
Merge pull request #50 from xiangli-cmu/master

bump deps