Deprecated `get_dict.sh`

The CMU dictionary occasionally introduces errors in the form of vowel
phones without stress stress numbers. Consequently, I am deprecating the
`get_dict.sh` script; instead, you should just use the forked version of
`dictionary.txt` which I will now place in this directory.
Added a working English dictionary forked from the CMU one.
Dictionary, now with all phones legal and in-vocabulary