enable dev on windows

[zrisher]

This is a collection of a few things I needed to get this working on Windows:

• Two cmd's to run the server and build the content respectively, from https://gist.github.com/traeblain/4252511
• Readme changes to that effect
• Supporting .gitignore changes
• Added - pip requirement before - pip: dependent requirements in environment.yml. For some reason, without this line the environment creation failed for me with

File "C:\Dev\Miniconda3\lib\site-packages\conda_env\installers\pip.py", line 8, in install
pip_cmd = main_list.pop_args(prefix) + ['install', ] + specs
TypeError: unsupported operand type(s) for +: 'NoneType' and 'list'