Make `pip install -e` work

This allows `pip install -e` and `python setup.py develop` to work
without having to do the stuff in
http://docs.ansible.com/intro_installation.html#running-from-source so
it's a tad nicer for Python programmers who are accustomed to installing
packages as editable/in development mode.

Fixes GH-8355 (https://github.com/ansible/ansible/issues/8355)
fixes #8626 by reverting 0d8b81cd
Fix fonts in docs: Incosolata -> Inconsolata
Merge pull request #8367 from msabramo/make_pip_install_editable_work

Make `pip install -e` work
Merge pull request #8635 from RockinRoel/devel

Fix fonts in docs: Incosolata -> Inconsolata
Make env param a dict type instead of list

Also modifies param type checking code to remove whitespace from
around params before splitting them into k=v pairs.

Fixes #8199
Merge pull request #8627 from rghe/devel

fixes #8626 by reverting 0d8b81cd
Tense correction
Merge pull request #8641 from ianmiell/imiell_docs

Tense correction