Add [.editorconfig](http://editorconfig.org/) global settings (supported by gogs) to normalize code contributions. The default settings are what I use in my repos.
Must be reviewed by @Uncled1023 with attention to the following:
```
end_of_line = lf # or crlf for windows env?
trim_trailing_whitespace = true # or false, since it's not good for Markdown files?
```
