Update docs structure.

docs/modules/ROOT/nav.adoc

@@ -1,5 +1,4 @@
-* xref:index.adoc[]
-** xref:intro.adoc[]
-** xref:spring-cloud-openfeign.adoc[]
+* xref:index.adoc[Introduction]
+* xref:spring-cloud-openfeign.adoc[]
 * xref:appendix.adoc[]
 ** xref:configprops.adoc[]

docs/modules/ROOT/pages/index.adoc

@@ -1,9 +1 @@
-[[cloud-native-applications]]
-= Cloud Native Applications
-
-include::partial$_attributes.adoc[]
-
-// TODO: figure out remote includes in docs and replace pasted text
-// include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/contributing-docs.adoc[]
-NOTE: Spring Cloud is released under the non-restrictive Apache 2.0 license.
-If you would like to contribute to this section of the documentation or if you find an error, you can find the source code and issue trackers for the project at {github-issues}[github].
+include::intro.adoc[]