Included the Markov model, deleted obsolete scripts

EM-algorithm/Makefile

EM-algorithm/README.txt

EM-algorithm/cluster_main.cpp

EM-algorithm/inout.h

EM-algorithm/main.cpp

EM-algorithm/params.h

EM-algorithm/update.h

Markov-model/README.txt

Markov-model/construct_background.py

Markov-model/execute.sh

Markov-model/move_wdir.sh

python_scripts/background_log_likelihood.py

python_scripts/compare_kmers.py

python_scripts/count_possible_kmers.sh

python_scripts/nucleotide_bias.py

python_scripts/plot.sh

python_scripts/rank_kmers.py