merged queue refactor crawler

CMakeLists.txt

crawler-parser-indexer-test

crawler/Readers/HttpReader.cpp

crawler/Readers/HttpsReader.cpp

crawler/UrlFrontier.cpp

crawler/UrlFrontier.h

crawler/crawler.cpp

crawler/crawler.h

crawler/spider.cpp

crawler/spider.h

crawler/tests/urlFrontierTest.cpp

main.cpp

parser/Parser.cpp

seedCreate.py

shared/ProducerConsumerQueue.cpp

shared/ProducerConsumerQueue.h

shared/TryPopTest.cpp

tests/testwebSeed.txt

tests/testwebSeed2.txt