Fixing Compiler Error C2466
Remove unused function StackString() and class CCoins;
Discover some missing includes
Merge pull request #4810

c0f5d4a Fixing Compiler Error C2466 (ENikS)
Merge pull request #4812

53efb09 Discover some missing includes (jtimon)
8d5e510 Remove unused function StackString() and class CCoins; (jtimon)