Added gitbook content (#4)

* Added gitbook content
Added user guide pdf

* Added links to new content

Author: garethahealy

_site/asciidoc/index.adoc

@@ -9,6 +9,10 @@ ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 .. link:news/news{outfilesuffix}[News]
 ... link:news/archived-news{outfilesuffix}[Archived News]
 
+== Documentation
+.. link:gitbook/index.html[Git Book]
+.. link:user-guide.pdf[User Guide.pdf]
+
 == Community
 .. link:community/articles{outfilesuffix}[Articles]
 .. link:community/support{outfilesuffix}[Support]

gitbook/about/about.adoc

@@ -0,0 +1,40 @@
+== What is Dozer?
+Dozer is a Java Bean to Java Bean mapper that recursively copies data
+from one object to another. Typically, these Java Beans will be of
+different complex types.
+
+Dozer supports simple property mapping, complex type mapping,
+bi-directional mapping, implicit-explicit mapping, as well as recursive
+mapping. This includes mapping collection attributes that also need
+mapping at the element level.
+
+Dozer not only supports mapping between attribute names, but also
+automatically converting between types. Most conversion scenarios are
+supported out of the box, but Dozer also allows you to specify custom
+conversions via XML.
+
+The mapper is used any time you need to take one type of Java Bean and
+map it to another type of Java Bean. Most field mapping can be done
+automatically by Dozer using reflection, but any custom mapping can be
+predescribed in XML format. Mapping is bi-directional so only one
+relationship between classes needs defining. If any property names on
+both objects are the same you do not even need to do any explicit
+property mapping for these fields.
+
+The picture below depicts some of the common areas Dozer could be
+inserted into an architecture. Notice that it typically is utilized at
+the boundaries (entry/exit). Dozer will make sure that your internal
+domain objects from the database do not bleed into external presentation
+layers or to external consumers. It can also help map your domain
+objects to external APIs calls and vice-versa.
+
+image:../images/architecture.gif[architecture]
+
+The bean mapper is written in Java and relies heavily on the Jakarta
+Commons Bean Utils package for Java Bean utility methods.
+
+=== Why Map?
+Please read the link:../documentation/whymap.adoc[Why Map?] page.
+
+=== Frequently Asked Questions
+Please read the link:../documentation/faq.adoc[FAQ] page.