Fix GitHub representation of AsciiDoc READMEs

README.adoc

@@ -1,11 +1,12 @@
-include::asciidoctor-config.ad[]
 = image:htmlsanitycheck-logo.png[HSC] Html Sanity Check (HSC)
+:doctype: book
+include::asciidoctor-config.ad[]
 
 ifndef::xrefToGradlePlugin[:xrefToGradlePlugin: htmlSanityCheck-gradle-plugin/README.adoc]
 
 [.lead]
 ====
-This project provides some basic sanity checking on HTML files.
+https://aim42.github.io/htmlSanityCheck[HTML Sanity Check] (HSC) provides some basic sanity checking on HTML files.
 
 It can be helpful in case of HTML generated from, e.g., {asciidoc-url}[Asciidoctor],
 Markdown or other formats -- as converters usually don't check for missing images

htmlSanityCheck-gradle-plugin/README.adoc

@@ -1,3 +1,4 @@
+= HSC Gradle Plugin
 :doctype: book
 include::../asciidoctor-config.ad[]
 
@@ -7,8 +8,6 @@ ifdef::jbake-type[]
 :gradleProperties: {project-url}/blob/develop/gradle.properties[]
 endif::jbake-type[]
 
-= HSC Gradle Plugin
-
 The {gradle-url}[Gradle] plugin of HTML Sanity Check (xref:{xrefToManual}[HSC]) enables to check generated or native HTML documentation from the Gradle build.
 
 [[sec:installation]]