Fixed bug in generateHMM regarding dummy tags

Was forgetting to split first element from queue to get dummy start
word/tag pair.

Now that all tokens are processed correctly, generated .hmm files
contain all probabilities as expected.

Bug remains in testHMM.py where all tags end up being END_TAG_HMM.
Suspect:
1) Various bugs in viterbi code
2) Underflow
3) Error in backtrace

TODO: Use logging module to diagnose bug further in testHMM.py
TODO: Convert probabilities in both programs to be log probabilities to
avoid underflow.