Add missing equals() and hashCode() implementations.
Add missing equals() and hashCode() implementations.

archiecobbs/jsimpledb,permazen/permazen,permazen/permazen,archiecobbs/jsimpledb,tempbottle/jsimpledb,gmsconstantino/jsimpledb,mmayorivera/jsimpledb,gmsconstantino/jsimpledb,tempbottle/jsimpledb,mmayorivera/jsimpledb,tempbottle/jsimpledb,archiecobbs/jsimpledb,gmsconstantino/jsimpledb,permazen/permazen,mmayorivera/jsimpledb