In Spanish the letter "r" in the alphabet is correctly pronounced as "ERRe", instead of "Ere".

soft `з, с` if previous syllable is soft

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

Changing da_rules was accidentally included in the commit.

This fixes the letter m being pronounced before f, even being in separate words.

mentioned in #1313 and #1325, plus fixes the pronunciation of Drive and Reaper.

cover all phoneme rules with
the tests.