Completing translation of czech strings

Hi there,

this is my first commit so, please be nice, patient and let me know if I should condribute in different way. I have completed translation of czech strings in TTS files. There are serveral things I did not know, so I guessed the correct way to do it

  1. **doubled data** - There are two files containg identical data. `ispeech_cs.csv` and `ttsconfig.p`. I have corrected on both places, so choose which one is better for you. Let me know if I have to do it differently next time.
  2. **dangling space** - I am little confused whether the space as the last character is required in `ttsconfig.p` file. Is is present in some strings and missing in others. I have left it exactly as it was in english version.

There are several mistakes in Czech TTS I would like to correct. Mainly they are connected to some pericularities in czech grammar. Simplyfied is goes like this - there is not only singular and plural, there is a thid case - in connection with numbers 2-4, resp more then 5-. To handle this I will have to edit the COMMAND BUILDING part. **Please give me pointers where I can find out about syntax of this** If there is no doc, just give me a pointer to sourcecode, which is parsing the file, so I can test it before submitting path.

Thanks for OSMAND!