Update README's - add new examples/README to help browsing the examples

[leonardpahlke]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

1. This PR adds a /examples/README.md which should help browsing the example data.
2. Highlight that the examples are generated with fake data
3. Update /README.md (remove some older comments...)

Which issue(s) this PR fixes:

Fixes #12

Special notes for your reviewer:

ref tracking issue: #4

Does this PR introduce a user-facing change?

None

[leonardpahlke]

cc @reylejano

[leonardpahlke]

@saschagrunert & @puerco if you find time for a review :pray: I just made changes to README's with this PR

/assign @justaugustus

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: leonardpahlke, saschagrunert

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[saschagrunert]

/lgtm