Merge branch 'master' of https://github.com/marozau/cpp_craft_0314 into homework-2
- added 'const boost::uint32_t' in 2_5;
- added checking that 'mean_mes_for_all_time !=0' in 2_5;
- moved '2' to constants in market_message.cpp
update 2_5

edit 'mean_mes_for_all_time !=0' in 2_5;
Merge pull request #228 from TereschenkovaEugeniya/homework-2

small fixes of homework 2