Thank you for contributing to Apache UIMA uimaFIT.

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?
      Please include a link to the JIRA ticked in the PR description.
- [ ] Does your PR title start with UIMA-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?
- [ ] Do the commit messages in your PR conform to the following format
```
[UIMA-<ISSUE-NUMBER>] <ISSUE TITLE>
<EMPTY LINE>
- <CHANGE 1>
- <CHANGE 2>
- ...
```

### For code changes:
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### For documentation related changes:
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### Note:
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**JIRA Ticket:** https://issues.apache.org/jira/browse/UIMA-XXXX

### For all changes:
- [ ] PR title starts with `[UIMA-XXXX]`.
- [ ] Commit messages conform to the following format
```
[UIMA-<ISSUE-NUMBER>] <ISSUE TITLE>
<EMPTY LINE>
- <CHANGE 1>
- <CHANGE 2>
- ...
```

### For code changes:
- [ ] PR includes new or updated tests related to the contribution.
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      LICENSE and NOTICE files in the respective modules where dependencies have been added as
      well as in the project root have been updated.

### For documentation related changes:
- [ ] PDF and HTML versions of the documentation render ok.

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Add contribution guidelines and PR template
[UIMA-5810] Add contribution guidelines and PR template

- Trimmed down the PR template to what is necessary
