dgpost installation

Released versions of dgpost are available on the Python Package Index pypi. Those can be installed using pip:

pip install dgpost

Use the optional argument --pre to get the latest tagged development version.

To install dgpost from source on Github, gh, you first need to clone the repository and then you can install the development version of the package using pip:

git clone git@github.com:dgbowl/dgpost.git
cd dgpost
pip install -e .[testing,docs]

The targets [testing] and [docs] in the above are optional, and will install the required dependencies to run the test suite and build the documentation, respectively.