core, eth/filters, miner, xeth: Optimised log filtering

Log filtering is now using a MIPmap like approach where addresses of
logs are added to a mapped bloom bin. The current levels for the MIP are
in ranges of 1.000.000, 500.000, 100.000, 50.000, 1.000. Logs are
therefor filtered in batches of 1.000.

core/chain_makers.go

@@ -105,7 +105,12 @@ func (b *BlockGen) AddTx(tx *types.Transaction) {
 	b.receipts = append(b.receipts, receipt)
 }
 
-func (b *BlockGen) AddReceipt(receipt *types.Receipt) {
+// AddUncheckedReceipts forcefully adds a receipts to the block without a
+// backing transaction.
+//
+// AddUncheckedReceipts will cause consensus failures when used during real
+// chain processing. This is best used in conjuction with raw block insertion.
+func (b *BlockGen) AddUncheckedReceipt(receipt *types.Receipt) {
 	b.receipts = append(b.receipts, receipt)
 }