**Summary**
We want to have a single source of truth for the contributing guide and the website seems to be the
place for it so direct people there instead of having a separate copy in the repo.
**Test plan**
Check both links and make sure they are not broken.
**Summary**
We have cleaned up our labels a bit and this PR adds some useful links for people to find what needs
attention from the community.
**Test plan**
Read and make sure the links and the text are accurate.
* Rename --quick-sloppy flag from `kpm check` to --integrity
* Make --save implicit when installing new modules, remove strict lockfiles, always create updated lockfile and populate tarball cache
* Add integrity hash check to `kpm install`
* Update kpm.lock
* remove incorrect assert messages
* split up package resolving and fetching
* update kpm.lock
* clean up activityStep, move back cursor at end to cover worker lines - fixes#262
* use fake jest timers
* remove old test
* add mocks to jest test ignore
* fix test fixture lockfile
* Add lockfile version header - fixes#280
* split up `kpm install` into `kpm add` - closes#284
* fix lint
* fix using `latest` tag when adding new dependencies - fixes#263
* clean up kpm entry files
* add useless `kpm version` command
* rename config.js to Config.js
* remove Makefile and switch to simple npm scripts
* add more flow-typed definitions
* correctly case Config file
* fix misc lint
* fix type annotation of PackageConstraintResolver#reduce
* fix bin/kpm nits and unused variable
* use dashed filenames instead of camelcase
* move add command fixtures to separate folder
* hoist common-mirror test folder
