Add `.editorconfig` style rules
Add `.editorconfig` style rules

* re-enforce requested project file formats and basic character-level coding style
* emphasize the Win/DOS requirement that BAT/CMD files *must* have CRLF line endings

.# Discussion

Using [EditorConfig](http://editorconfig.org) style rules helps devs to
maintain the file formatting and style of the project, even while using different
editors. This minimizes the semi-invisible, but, paradoxically, visually noisy,
whitespace differences between commits. It can also help enforce file format
requirements (such as the Win/DOS CMD shell requiring CRLF line endings for
correct functioning of BAT/CMD files).

lukesampson/scoop,pacificcoast/scoop,yunspace/scoop,rasa/scoop,kodybrown/scoop,rodericktech/scoop,saildata/scoop,rivy/ladle,pacificcoast/scoop,barohatoum/scoop,guillermooo-forks/scoop,berwyn/scoop,bpollack/scoop,rivy/scoop,rivy/ladle,deepwaterdiver/scoop,huncrys/scoop,huncrys/scoop,coonce/scoop,moigagoo/scoop,nikolasd/scoop,barohatoum/scoop,ErnWong/scoop,reelsense/scoop,DarylWright/scoop,deepwaterdiver/scoop,r15ch13/scoop,nueko/scoop,toxeus/scoop,ShwoognationHQ/scoop,damnhandy/scoop,Cyianor/scoop,bcomnes/scoop,Congee/scoop,vidarkongsli/scoop,rmyorston/scoop,seonho/scoop,systemexitzero/scoop,vinaynambiar/lukesampson-,devoncarew/scoop