Remove Olympus code (#779)

* Remove nolonger used moniker package

Usage was removed in 97d8013

* Remove reference to Zeus

Use name Proxy for now.

* Remove Olympus code

See github issue #777

* Remove Olympus related vendor modules

* Mention Olympus removal in docs

* Add note about no registries existing

* Remove eventlog

* Update docs for Olympus removal

Makefile

@@ -1,7 +1,6 @@
 .PHONY: build
 build:
 	cd cmd/proxy && buffalo build
-	cd cmd/olympus && buffalo build
 
 .PHONY: run
 run: build
@@ -26,7 +25,6 @@ verify:
 .PHONY: test
 test:
 	cd cmd/proxy && buffalo test
-	cd cmd/olympus && buffalo test
 
 .PHONY: test-unit
 test-unit: