added stemmer and fixed parserE2E test

.gitignore

CMakeLists.txt

cmake-build-debug/CMakeFiles/CMakeOutput.log

cmake-build-debug/CMakeFiles/Makefile.cmake

cmake-build-debug/CMakeFiles/Makefile2

cmake-build-debug/CMakeFiles/TargetDirectories.txt

cmake-build-debug/CMakeFiles/clion-log.txt

cmake-build-debug/CMakeFiles/progress.marks

cmake-build-debug/Makefile

parser/Parser.cpp

parser/Parser.h

parser/tests/parserTest.cpp

shared/Document.cpp

util/Stemmer.h

util/Tokenizer.cpp

util/Tokenizer.h

util/stringProcessing.cpp

util/stringProcessing.h

util/tests/stringProcessingTest.cpp