* `--mode=off` now works.
* Add Mode::Off as a persistent CLI option.
* "last" not "auto" as default.
* Commit accidentally unsaved file.
* Whitespace
[ci:skip]
* Mode CLI parse fix
* or offline
* Save mode when it gets changed.
* Fix Offline mode
* Fix up mode operations.
* Make passive default, but not overriding.
* Fix test
* Maybe not everyone wants to run an archive node...
* The front-end for each hard-fork, also EIP-160.
* Address EIP161 a/c
* Include EIP-161b
* EIP-161 part d.
* Fix test build.
* Fix one test, add another.
* Fix use of bloom & renaming.
* Initial groundwork for EIP-155
* Fix minor bug.
* Fix all tests finally.
* Rest of EIP-155.
* Add tests for EIP-155 algorithm.
Update transaction tests validation.
* Minor reformat.
* Address grumbles.
* Remove unused code.
* Fix SUICIDE gas mechanism and add consensus tests.
* Remove commented code.
* Set Frontier hardfork block number
* Fix warning.
* Transaction tests,
* provide snapshot sync info in eth_syncing
* specify block gap in eth_syncing
* Extend eth_syncing with warp, format the output properly
* adjust serialization tests for sync info
* whitespace
* gas price distribution + median + tests
* put histogram in util
* use the util histogram
* remove the default gas price implementation
* histogram rpc
* fix empty corpus
* Add JS ethcore_gasPriceHistogram
* Fix typo (s/types/type/) & subsequent failing test
* Fix return type & formatting
* bucketBounds
* Add jsapi e2e test verification
* clarify "cancelled periodic snapshot" message
* more rigorous checks for snapshot validity
* verify ancient blocks on import
* limit number of fed blocks
* make it possible to feed snapshot service canonical hashes
* fix failing test build
* swap ethash DAG only when more recent
