Support "earliest" and specific block parameters in RPC where possible

with modus ponens panickers

* dont use system temp for migration, do backup

* fixed issue with number of open files on osx

* fixed compilation of util tests

Empty trusted signer crate with it's general purpose described.

More bootnodes for morden.

move existing rpc tests into mocked module

Conflicts:
	.travis.yml
	Cargo.toml
	cov.sh
	doc.sh
	fmt.sh
	hook.sh
	test.sh

* 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

* Renaming dapps repos. Updating dapps

* Skipping legacy options for compatibility. Fixing tabs

* Fixing CLI options

fixed pending transactions

Fixing clippy warnings

correct signature of SecTrieDB::raw_mut

&mut T is invariant over its type parameter, so we need to specify the trait's lifetime explicitly rather than coerce it to the elided lifetime

* Bumping clippy. Fixing warnings

* Removing unused import

* Fixing complexity and arguments warning on two functions

* Display progress when importing

* Additional polish.

* Fix strange yielding behaviour.

* Allow colour to be disabled.

Fixed #1135

* simple db migration

* make migration slightly more functional

* migration version is just a single unsigned integer

* Fix --geth IPC for MacOS.

* fix pending_* methods in MinerService, add pending_receipts

* pending logs

* include pending logs when polling

* fixed returning pending logs multiple timees

* log type

* transactionHash is supplied to pending logs

* miner returns receipts together with hashes

* bring back miners all_transactions used by sync module

* Add info message for mined block.

* Coloured, padding logging.

* Remove superfluous logs.

* Use better term colour module.

* Basic hex block exporting.

* Export formats and to file.

* First bits.

* Block importing.

* Fix error text.

* Wait for queue to empty before shutting down after import.

Have `die_with_error` use `fmt::Display` rather than Debug

Exporting