+ 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.

+ Stylized option menu
+ The menu now defaults to whatever theme being the most preferred one

+ Changes dark theme changes to a different css to respect future docfx.css changes
+ Merge featherlight plugin into the dark theme

* added UserDefaultAvatar to IUser

* pass ushort as discriminator

* removed unneeded ushort.parse

* Create new entities on each build call. Added Length property to EmbedBuilder.

* Resolve Length issues per #1012