Update README.rst
New list of stops + new inflection (using Treex)

List of PID stops as of July 2013 taken directly from:
http://www.ropid.cz/data/Galleries/70/100/d790_1_Seznam_zastavek_2013-07.pdf
Merge branch 'master' of github.com:UFAL-DSG/alex
Perl script for expanding stops using Treex
Merge branch 'master' into ptics_slu
Improving the HDC SLU on 1k utterances.