Adding new TTS preprocessing replacements

Based on a manual inspection of the stops list
One more.
More fixes (thanks David for "Hewlett")
Merge branch 'master' into tts_preprocessing_fixes
"Kam chcete jet?" should sound less weird.
Fix in onlineupdate function if the file does not exists.
Will not fail if the remote file does not exist
Testing HTK ASR with the _SIL_ in the LM.
Fix in ASR text preprocessing.
Merge branch 'master' of github.com:UFAL-DSG/alex
Fix in ASR text preprocessing.
Expanding EN phonetic dictionary.
Merge branch 'master' of github.com:UFAL-DSG/alex
Merge pull request #9 from UFAL-DSG/online_update_fix

The online model update will not fail if the remote file does not exist
Using unicode for config. Merge.
Fixing using HTK ASR with the _SIL_ in the LM.
Merge branch 'master' of github.com:UFAL-DSG/alex
Removing a silence word from the HTK scripts.
Fixed building the hdecode dict.
Added download link to Flite