update slf4j-api to latest
improved logging documentation
javadoc improvement
avoid warning when running 'mvn site' without reporting profile
more details on logging implementation
more explanations on logger names
link to SLF4J documentation on switching SLF4J binding
give coordinates of plexus configuration files used to define content
Updated p-u
Modello 1.8, p-int 1.18
Updated to latest p-u and p-int
Updated to latest classworlds to get concurrent classloading and resource loading perf improvment
Upgraded to modello 1.8.1
MNG-5503: Fix for the issue where Maven 3.1.0 fails to resolve artifacts produced by reactor build

The general strategy is to fall back to Aether artifact type and use its notion of identity as much as possible. I have
a simple IT taken from the sample project that I will also push.
p-u .15
code formatting
improved sisu/guice description:
- new Eclipse sisu structure
- added a link to guice, used through a sisu-patched version
better representation of the fact that sisu-inject uses stock guice
where sisu-plexus uses patched version
forgot cropping image
Add references to m-dependency-p