ref(cache): build Redis from source
docs(installing_deis): remove in-place upgrade documentation
Merge pull request #1852 from mboersma/fix-cache-image

ref(cache): build Redis from source
Update README.md

World's smallest docs typo fix.
Merge pull request #1860 from fmd/patch-1

Update README.md
Merge pull request #1854 from carmstrong/remove_upgrade_documentation

docs(installing_deis): remove in-place upgrade documentation
refactor(makefile): remove fleet, switch to deisctl and custom images
fix(user-data): restore default discovery url
docs(readme): update root readme with new deisctl instructions
docs(hacking): new docs for hacking on deis
fix(readme): address feedback, fix typos
fix(makefile): default to 3 nodes, test for docker binary
docs(readme): add hack instructions to readme, remove newline
ref(Makefiles): use $BUILD_TAG, which defaults to "git rev-parse"
ref(tests): use images from "make build" in component tests
fix(user-data): add fixed version of sed command to "make discovery-url"
fix(tests): improve functional test setup logic