Add KeywordSearch module and Ingester class

.gitignore

KeywordSearch/build.xml

KeywordSearch/manifest.mf

KeywordSearch/nbproject/build-impl.xml

KeywordSearch/nbproject/genfiles.properties

KeywordSearch/nbproject/project.properties

KeywordSearch/nbproject/project.xml

KeywordSearch/nbproject/suite.properties

...ordSearch/release/modules/ext/apache-solr-solrj-3.4.0.jar

...src/org/sleuthkit/autopsy/keywordsearch/Bundle.properties

...rch/src/org/sleuthkit/autopsy/keywordsearch/Ingester.java

...dSearch/src/org/sleuthkit/autopsy/keywordsearch/layer.xml

nbproject/project.properties