Backports to beta (#2068)

* Fix several RPCs (#1926)

* Fix up pending receipts details.

* Add support for additional params and registry over RPC.

* Fix tests.

* Add test, additional fix.

Fixes #1932.

* Fix up tests.

* Fix test.

* Fix test.

* DB WAL size limit (#1935)

* Limit WAL size

* Check pruning by db modification date (#1924)

* Cache address hash (#1943)

* ECIES without MAC (#1948)

* Use random IV for ECIES AES

* ECIES encrypt/decrypt for a single message

* Derive IV from shared secret

* Apply settings to column families

* fixed #1933 (#1979)

* Fixed neighbours collection (#1996)

* dapps-hosts configuration

* Disabled counter check

* always process trie death row on commit, add more tracing

* fixed transaction addresses mapping, fixes #1971

* simplified iterator

* v1.3.1

* v1.3.1

ethcore/res/ethereum/morden.json

@@ -8,7 +8,7 @@
 				"difficultyBoundDivisor": "0x0800",
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
-				"registrar": "",
+				"registrar": "0x8e4e9b13d4b45cb0befc93c3061b1408f67316b2",
 				"frontierCompatibilityModeLimit": "0x789b0"
 			}
 		}