make Gold=>Gem conversion cap message more accurate in terms of when to wait until - fixes https://github.com/HabitRPG/habitrpg/issues/3996
Merge pull request #370 from Alys/gem-cap-message-2014-11-25

make Gold=>Gem conversion cap message more accurate in terms of when to wait until - fixes https://github.com/HabitRPG/habitrpg/issues/3996