MINIFI-127: Added quick start document.

[thesolson]

Thank you for submitting a contribution to Apache NiFi - MiNiFi.

In order to streamline the review of the contribution we ask you
to ensure the following steps have been taken:

For all changes:

• Is there a JIRA ticket associated with this PR? Is it referenced
  in the commit message?
• Does your PR title start with MINIFI-XXXX where XXXX is the JIRA number you are trying to resolve? Pay particular attention to the hyphen "-" character.
• Has your PR been rebased against the latest commit within the target branch (typically master)?
• Is your initial contribution a single, squashed commit?

For code changes:

• Have you ensured that the full suite of tests is executed via mvn -Pcontrib-check clean install at the root nifi-minifi folder?
• Have you written or updated unit tests to verify your changes?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE file, including the main LICENSE file under minifi-assembly?
• If applicable, have you updated the NOTICE file, including the main NOTICE file found under minifi-assembly?

For documentation related changes:

• Have you ensured that format looks appropriate for the output in which it is rendered?

Note:

Please ensure that once the PR is submitted, you check travis-ci for build issues and submit an update to your PR as soon as possible.

[brosander]

@thesolson it looks like there need to be some newlines in this section to make the numbered lists appear properly.

I think I usually do a newline before and after the list.

[apiri]

hey @thesolson,

got to scope this out and overall looks good. some folks also had some additional commentary for some minor fixes, but otherwise looks like a great start and will certainly be helpful for getting people going down the appropriate path

[JPercivall]

@apiri @thesolson I created a patch addressing the feedback that was left. Just rename it from ".txt" to ".patch" to apply it.

0001-MINIFI-127-In-quick-start-guide-removing-processors-.txt

[thesolson]

@apiri I've applied Joe's patch. The changes look great! Please feel free to finalize the review and merge if appropriate.

[apiri]

@thesolson & @JPercivall,

Thanks for the updates/patches. Looks good here and will get this merged in.