Git workflow for Datashim development

We'll roughly follow the Github development flow used by the Kubernetes project.

Visit https://github.com/datashim-io/datashim. Fork your own copy of Datashim to your Github account. For the sake of illustration, let's say this fork corresponds to https://github.com/$user/datashim where $user is your username.
Go to the source directory of your Go workspace and clone your fork there. Using the example above where the workspace is in $HOME/goprojects,
```
$> mkdir -p $HOME/goprojects/src
$> cd $HOME/goprojects/src
$> git clone https://github.com/$user/datashim.git
```

Set the Datashim repo as your upstream and rebase

$> cd $HOME/goprojects/src/datashim
$> git remote add upstream https://github.com/datashim-io/datashim
$> git remote set-url --push upstream no_push

The last line prevents pushing to upstream. You can verify your remotes by git remote -v

$> git fetch upstream
$> git checkout master
$> git rebase upstream/master

Create a new branch to work on a feature or fix. Before this, please create an issue in the main Datashim repository that describes the problem or feature. Note the issue number (e.g. nnn) and assign it to yourself. In your local repository, create a branch to work on the fix. Use a short title (2 or 3 words) formed from the issue title/description along with the issue number as the branch name
```
$> git checkout -b nnn-short-title
```
Make your changes. Then commit your changes. Always sign your commits
```
$> git commit -s -m "short descriptive message"
$> git push $your_remote nnn-short-title
```
When you are ready to submit a Pull Request (PR) for your completed feature or branch, visit your fork on Github and click the button titled Compare and Pull Request next to your nnn-short-title branch. This will submit the PR to Datashim.io for review
After the review, prepare your PR for merging by squashing your commits.

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