update to velocity 1.4-dev
Change from ${basedir}/multiproject/navigation.xml to ${maven.docs.src}/navigation.xml
as the nav source for user supplied nav templates
Bad j:set tags fixed
Made aggregation directory configurable, use artifactId instead of
name for creating site directories / URLs.
Updated multiproject:site to automate navigation generation for all projects
Added multiproject 'install', 'install-snapshot', 'deploy' and 'deploy-snapshot'
facility
Rename plugin from reactor to multiproject to reduce confusion
Initial creation during 1.0-beta 10 dev phase
