Adding upstream version 1.5.0.upstream/1.5.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# Development Guide
+
+This is a guide for developers who would like to contribute to this project. It is recommended to use Python 3.6 and above for development.
+
+If you're interested in contributing to litecli, thank you. We'd love your help!
+You'll always get credit for your work.
+
+## GitHub Workflow
+
+1. [Fork the repository](https://github.com/dbcli/litecli) on GitHub.
+
+2. Clone your fork locally:
+    ```bash
+    $ git clone <url-for-your-fork>
+    ```
+
+3. Add the official repository (`upstream`) as a remote repository:
+    ```bash
+    $ git remote add upstream git@github.com:dbcli/litecli.git
+    ```
+
+4. Set up a [virtual environment](http://docs.python-guide.org/en/latest/dev/virtualenvs)
+   for development:
+
+    ```bash
+    $ cd litecli
+    $ pip install virtualenv
+    $ virtualenv litecli_dev
+    ```
+
+    We've just created a virtual environment that we'll use to install all the dependencies
+    and tools we need to work on litecli. Whenever you want to work on litecli, you
+    need to activate the virtual environment:
+
+    ```bash
+    $ source litecli_dev/bin/activate
+    ```
+
+    When you're done working, you can deactivate the virtual environment:
+
+    ```bash
+    $ deactivate
+    ```
+
+5. Install the dependencies and development tools:
+
+    ```bash
+    $ pip install -r requirements-dev.txt
+    $ pip install --editable .
+    ```
+
+6. Create a branch for your bugfix or feature based off the `master` branch:
+
+    ```bash
+    $ git checkout -b <name-of-bugfix-or-feature>
+    ```
+
+7. While you work on your bugfix or feature, be sure to pull the latest changes from `upstream`. This ensures that your local codebase is up-to-date:
+
+    ```bash
+    $ git pull upstream master
+    ```
+
+8. When your work is ready for the litecli team to review it, push your branch to your fork:
+
+    ```bash
+    $ git push origin <name-of-bugfix-or-feature>
+    ```
+
+9. [Create a pull request](https://help.github.com/articles/creating-a-pull-request-from-a-fork/) on GitHub.
+
+
+## Running the Tests
+
+While you work on litecli, it's important to run the tests to make sure your code
+hasn't broken any existing functionality. To run the tests, just type in:
+
+```bash
+$ ./setup.py test
+```
+
+litecli supports Python 2.7 and 3.4+. You can test against multiple versions of
+Python by running tox:
+
+```bash
+$ tox
+```
+
+
+### CLI Tests
+
+Some CLI tests expect the program `ex` to be a symbolic link to `vim`.
+
+In some systems (e.g. Arch Linux) `ex` is a symbolic link to `vi`, which will
+change the output and therefore make some tests fail.
+
+You can check this by running:
+```bash
+$ readlink -f $(which ex)
+```
+
+
+## Coding Style
+
+litecli uses [black](https://github.com/ambv/black) to format the source code. Make sure to install black.
+
+It's easy to check the style of your code, just run:
+
+```bash
+$ ./setup.py lint
+```
+
+If you see any style issues, you can automatically fix them by running:
+
+```bash
+$ ./setup.py lint --fix
+```
+
+Be sure to commit and push any stylistic fixes.