fix single characters transcription for б, ж, й, ў

fix "здж" > "ждж" rule, fix test for it
add rules for "б г д дз дж з" at the end of words
add devoiced rules conversion
add some words to vocabulary
added tests for new rules

- fixed/removed not working rules in be_list
- added stress to the words in be_list
- fixed multi thousand transcription
- removed not working rules in be_rules
- added rules of palatalization, phonemes lengthen
- fixed dropping of [a] at the end of words
- fixed message "Full dictionary is not installed for"
- added configuration in tr_languages.c
- fixed/added phonemes for `Q`, `ts`, `ts;`, `dz`, `dz.`, `;` etc

This patch strip out dependency on Russian, as its complicated relationship
between spelling and pronunciation overburden rules for Belarusian. The rules
themselves are also added. They don't have devoicing at the end of the words
for now. Also, gemination of consonants doesn't work as expected, as it seems
on the top of this rule some other rules apply. This after-processing is
responsible also for the strange behaviour of ending [a].