Update file structure to closer match GO standards

[redhatrises]

This restructuring moves files/folders to match what other go projects are doing as well as
layout suggested at https://github.com/golang-standards/project-layout

[codecov]

Codecov Report

Merging #289 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #289   +/-   ##
=======================================
  Coverage   89.48%   89.48%           
=======================================
  Files          32       32           
  Lines        1027     1027           
=======================================
  Hits          919      919           
  Misses         88       88           
  Partials       20       20

Impacted Files	Coverage Δ
pkg/lib/standards/standard.go	100% <ø> (ø)
pkg/lib/components/versions/3_1_0/component.go	100% <ø> (ø)
pkg/lib/common/references.go	100% <ø> (ø)
pkg/cli/docs/gitbook/gitbook.go	81.81% <ø> (ø)
pkg/cli/docs/gitbook/gitbookSummaries.go	90.47% <ø> (ø)
pkg/lib/opencontrol/parse.go	90.47% <ø> (ø)
pkg/cli/get/resources/downloader.go	100% <ø> (ø)
pkg/cli/docs/gitbook/gitbookCertification.go	95.18% <ø> (ø)
pkg/lib/opencontrol/versions/1.0.0/opencontrol.go	93.54% <ø> (ø)
pkg/lib/components/parse.go	100% <ø> (ø)
... and 20 more

---

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[redhatrises]

Ignore codeclimate CI failure. These are pre-existing issues that need to be worked out in the future for legacy code.

[shawndwells]

Reviewed the codeclimate changes -- they're all legacy refactoring. Thanks for updating the project structure!