working tests, trying to add a shutdown method

ISRWord-tests

ParserTest

QueueTest

StemmerTest

StringProcessingTest

TokenizerTest

crawler-parser-indexer-test

crawler-parser-test

crawler/UrlFrontier.cpp

crawler/UrlFrontier.h

crawler/crawler.cpp

crawler/savedQueue

crawler/spider.cpp

crawler/spider.h

indexer/Indexer.cpp

indexer/Indexer.h

isolated-integration

main.cpp

search-engine

shared/url.h