labels: Fixing linting errors.
proxy: fixing linting errors.
scheduler: use New rather than Make for construction helpers.
proxy: lock should be above the fields it protects.
Fixes golint errors in pkg/labels
Fixes golint errors in pkg/master
Fixes golint errors in pkg/proxy
Merge branch 'master' into fix/golint

Conflicts:
	pkg/master/master.go
	pkg/master/pod_cache.go
	pkg/proxy/config/file.go
	pkg/proxy/proxier.go
	pkg/proxy/roundrobbin.go
	pkg/scheduler/randomfit.go
	pkg/scheduler/randomfit_test.go
Eliminates tautological comments
Correct the style of nested conditionals
Corrects wording of godoc comments.
Merge pull request #407 from yugui/fix/golint

Fixes Go lint errors.