Minor floonet update, mainnet preparation

Change Log

v0.5.2 (2019-01-11)

Full Changelog

Implemented enhancements:

• [TUI] block hashes in TUI will need to be larger than first 8 chars for mainnet #2314
• panic at get\_locator out of bound index #1855
• [proposal] hash preimage support #1527
• Wallet - only update outputs with unconfirmed transactions outstanding #2322 (yeastplume)
• Enforce zeroing of serialized proof excess bits #2315 (ignopeverell)
• Implement kernel and output features as enums #2312 (antiochp)
• add https as optional for server api #2310 (garyyu)

Fixed bugs:

• Failure to start when "archive_mode = true" #1877

Closed issues:

• Faucet: Posting transaction slate / Invalid request body #2335
• testnet vs mainnet conditional logic #2140
• Github Webhook #2133

Merged pull requests:

• Add 'recover' option to grin wallet init #2330 (yeastplume)
• Fix doc dump_stored_tx -> retrieve_stored_tx #2329 (icook)
• wait_for_min_peers should continue waiting if none connected #2326 (garyyu)
• Replace default fmt::Display on core::Hash #2325 (eupn)
• Cleanup compiler warnings #2323 (sesam)
• Automate wallet seed recovery process #2319 (yeastplume)
• Use ZeroingString for password and passpharse in wallet #2285 (hashmap)
• add @hendi and community DNS seed #2283 (hendi)
• Dandelion cycle fix #2185 (antiochp)