Correct maximum limit on trade, fix bug in BTCe module
Allow maximum amount to sell to be set on a per-currency basis
Disable repeat action block
Review buy/sell rules to address odd pennies left in balances
Standardise parameters to config module get/compare routines
Code tidy-up, move several calculations into subs
Allow actual change in rate to be used to override %age change
Make dont buy/sell exchange specific; fix errors