repeating chat messages

some config options available:
- pm repeat only private msg
- all repeat all msg
- off disable feature

proposal for # 32
tests for big_msg_repeat configuration
[TESTS] add two test cases for loading conf big_msg_repeat for Frostbite2 games : now cover cases where case varies and where users use unexpected values
[TESTS] Frostbite2: add test cases for `saybig()` and `message()` depending on `big_b3_private_responses` and ` big_msg_repeat`
Merge pull request #1 from thomasleveil/features/repeat_sayLoudOrPM

add more test cases for sayLourdOrPM changes
fix variable name
rewrite and documented load_conf_big_msg_repeat
Merge pull request #34 from ozon/features/repeat_sayLoudOrPM

[Frostbite2] add an option to repeat as private chat all (or pm) texts sent as a big message