Bloomchain (#1014)

* use bloomchain crate in blockchain module. remove obsole chainfilter submodule

* update database version to 6.0

* removed redundant line

* simple db migration

* make migration slightly more functional

* bloomchain migration

* migration version is just a single unsigned integer

* updated migration v6

* parity migration

* db migration

* removed hardcoded migration dir

* replace ptr::copy with clone_from_slice, removed potential endianess problem from trace/db.rs

* removed superfluous line

* blockchains log blooms config is not exposed any more

ethcore/src/blockchain/cache.rs

@@ -23,8 +23,6 @@ pub struct CacheSize {
 	pub block_details: usize,
 	/// Transaction addresses cache size.
 	pub transaction_addresses: usize,
-	/// Logs cache size.
-	pub block_logs: usize,
 	/// Blooms cache size.
 	pub blocks_blooms: usize,
 	/// Block receipts size.
@@ -33,5 +31,7 @@ pub struct CacheSize {
 
 impl CacheSize {
 	/// Total amount used by the cache.
-	pub fn total(&self) -> usize { self.blocks + self.block_details + self.transaction_addresses + self.block_logs + self.blocks_blooms }
+	pub fn total(&self) -> usize {
+		self.blocks + self.block_details + self.transaction_addresses + self.blocks_blooms + self.block_receipts
+	}
 }