ref(*): Manage test dependencies using godeps

Simplify test running and dependency management.

Follow deis coding standards
> Use of third-party go packages should be minimal, but when doing so,
vendor code into the Deis package with the godep tool.
feat(contrib/ec2): add optional support for IAM instance profiles
docs(using_deis/*): add scale example and clarify process == container
Set Multiple configs

Set multiple configs at once
add deis to $PATH command

add deis to $PATH command
Set Multiple configs

Set Multiple configs
docs (API): edited config to set multiple values

This edits the set config example to allow setting multiple values at once
docs (API): formatted according to coding standard

This formats the key and value to match the coding standard
docs (deis-cli): removed sudo for consistency

Removed sudo from the command for consistency
fix(tests): destroy without --app flag to remove git remote
Merge pull request #2743 from mboersma/fix-apps-destroy-test

fix(tests): destroy without --app flag to remove git remote
docs(*): use https:// URL for ci.deis.io
Merge pull request #2738 from mboersma/ci-to-https

docs(*): use https:// URL for ci.deis.io
Merge pull request #2577 from johanneswuerbach/godep-tests

ref(*): Manage test dependencies using godeps
fix(Vagrantfile): disable replacing of default insecure key
fix(contrib): use 1GB per VM

Most modern laptops have ~8GB of memory available to them. On OSX,
this is stretched even thinner due to boot2docker. Lowering the memory
requirement for each host back to CoreOS' default memory requirements
should allow us to use Vagrant on machines with less than 16GB of
memory.
ref(builder): use bash-style substitution

This is already in use at check-repos, which is a fancier way of
stripping the file extension from a string.
re-revert "ref(tests): switch to example-dockerfile-http app"

example-dockerfile-http has switched over to ubuntu:trusty for better
compatibility with apps:run (busybox does not ship with bash).

This reverts commit ebded177705e257d8227a836bade85331d56f8d7.
ref(*): consolidate all go dependencies into root Godeps
ref(*/Makefile): copy Godeps as needed for docker builds