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.
Merge branch 'master' into tts_preprocessing_fixes
Fixes after testing with vhub
Found one more TTS error

Bus 'H2' (only for disabled, but still used as a connection :-( )
Merge pull request #6 from UFAL-DSG/tts_preprocessing_fixes

Adding new TTS preprocessing replacements