Extract GCP Monitoring (nytimes#192)

* Extract GCP Monitoring

* remove s

* add pkg doc

* return exporter

* return flush func

* try another approach

* bypass if check

* gcputil -> observe

* fix doc

* pr fixes

* fix gae metrics

* pr fixes

* pr fixes

* doc fixes

* better err msg

* log fix

* remove prom from observe

* sd brand

* fix build

* observe README

Add resource information to logger of GKE, GCE and AWS EC2 (nytimes#180)

* Add resource information to logger of GKE, GCE and AWS EC2

* Remove env var. Add return error

* Handling error of stackdriver logger creation

* Handling error of stackdriver logger creation

* Docs for logID

* LogID Doc and use default values if is not provided

* Update error message

* Update doc

Removing go-kit/metrics/provider to save us from dependency overload (n…

…ytimes#177)

* removing go-kit/metrics/provider to save us from dependency overload

* comment styling

* setting prom-specific configs for better latency charts

Initialize opencensus for GKE (nytimes#176)

* Initialize opencensus for GKE

* update readme

* Generalize initialization of sd exporter

* fix sdExporterOptions

* do not initilize SD exporters and error reporting unless we are in the cloud or set proper environment variables

* Update doc

* address comments

* remove redundant if

Remove explicit call to use credentials from environment variables (n…

…ytimes#175)

* use default credentials

* remove else block altogether

* revert client initialization changes

[auth/gcp] properly setting the service account email as the issuer a…

…nd subject for IAM (nytimes#174)

* [auth/gcp] properly setting the service account email as the issuer and subject

* mods update

[WIP] Cleaning up underused and non-recommended code (nytimes#171)

Cleaning up underused and non-recommended code

adding an iss field to IAM tokens (nytimes#172)

[server/kit] adding NewLogger to use for background logging + updated…

… docs (nytimes#170)

* adding NewLogger to use for background logging + upped kit docs

* doc cleanup

* removing tab from docs

* p->P

[auth/gcp] allowing IAMConfig to override default Google credentials (n…

…ytimes#169)

* IAM going to provide my own JSON sometimes

* using the proper token source