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.
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.
Merge branch 'master' into tts_preprocessing_fixes
Merge branch 'master' of github.com:UFAL-DSG/alex
Fixes after testing with vhub
Found one more TTS error

Bus 'H2' (only for disabled, but still used as a connection :-( )
Adding a few more expressions to SLU bootstrap
Merge pull request #11 from UFAL-DSG/slu_bootstrap_enhance

Adding a few more expressions to SLU bootstrap
Merge pull request #6 from UFAL-DSG/tts_preprocessing_fixes

Adding new TTS preprocessing replacements
Merge branch 'master' into navigation_fixes