LUCENE-3944: Make the 'generate-maven-artifacts' target use filtered POMs placed under lucene/build/poms/, rather than in each module's base directory. The 'clean' target now removes them.
SOLR-3200 and SOLR-3226: fixing SignatureUpdateProcessorFactory to include non-String values, and to deal with the 'all fields' case correctly (merge r1308604)
SOLR-3294: In contrib/clustering/lib/, replaced the manually retrowoven Java 1.5-compatible carrot2-core-3.5.0.jar (which is not publicly available, except from the Solr Subversion repository), with newly released Java 1.5-compatible carrot2-core-3.5.0.1.jar (hosted on the Maven Central repository). Also updated dependencies jackson-core-asl and jackson-mapper-asl (both v1.5.2 -> v1.7.4).