4.0.0-beta4

Bugs Fixed

• HTML attributes on elements that a tag helper targets are double-encoded (#335)
• Attributes with no value don't invoke IntelliSense. (#271)

Features

• Make RazorError deserializable (#330)
• Multiple [TargetElement] attributes on a single TagHelper should de-dup if multiple match. (#326)
• Consider moving TagHelperOutput.Generate*() functionality to RazorPage.Write in Mvc. (#318)
• Allow tag helpers to target elements by attribute (#311)
• Modify '?' in @addtaghelper and @removetaghelper to mean 1 character and not "optionally 1 character" (#297)
• Change TagHelperOutput Content, PreContent and PostContent to all be TextWriters to avoid large string allocations. (#296)
• Create parser error for empty TagHelper bound attribute values. (#289)
• @addtaghelper and @removetaghelper should allow wild cards. (#285)
• Remove the @Helper directive from Razor (#281)
• Camel-case tag helper directives (#264)
• Add TagHelperContext.Items bag to enable passing values between related tag helpers (#238)
• Support disabling tag helper processing at the element level (#187)
• Implement Order (#94)