* Add EditorConfig

* Add basic .NET style rules

* Add naming rules

* Add some more extension

* Add target of the internal fields

* Fix build fails when built on macOS and Linux

* Use 'Condition' attributes

refs: 6f29dda78b (r181371650)

+ Rename Guides.Concepts.Logging title from 'Logging' to 'Logging Events/Data'.
+ Rewrite various sections of Guides.GettingStarted.FirstBot and Guides.GettingStarted.Installing based on suggested changes from #1027.
+ Rename project.csproj example to project.xml to avoid auto-compilation from Visual Studio Code.
+ Rename 'samples\intro' to 'samples\first-bot' to reflect on the article name change.
+ Clean first-bot samples.

+ Each section has gone through a thorough proof-reading and cleanup
+ This should help with readability.

+ Increase line-height to make pages look less squished.
+ Add master stylesheet.
	- Move content that are not theme-specific to master CSS.
+ Target latest featherlight.js instead of 1.7.6.
+ Add javascript for cornerifying images.
+ Add escape mention image, courtesy of @Andrewww1.

+ Codealike is a Visual Studio extension for developers to track their time spent on projects.
  It may drop additional file called codealike.json at the project root.

This change is because how our repo and project namespace uses .Net instead of .NET.
For consistency sake, we should refer to the project as Discord.Net.