Release 0.1.5

What's Changed

• Update telliot docs - proposed changes to getting started by @spuddyminer in #527
• Add gnosis chain/testnets native token feed by @akremstudy in #528
• Correct docker release instructions by @oraclown in #530
• Add err handling for getting account nonce by @oraclown in #533
• Reduce redundant api calls by @akremstudy in #529
• Include steps for native token price of new chain by @oraclown in #534
• Add Gnosis chain and xdai feed by @spuddyminer in #536
• Change example to eth/usd, add more info on sources chosen by @oraclown in #540
• Tell user they need to add account instead of throwing err by @oraclown in #539
• Update new query type docs by @oraclown in #541
• Add test trb & native token to prereqs by @oraclown in #555
• Update docs based on workgroup feedback #2 by @oraclown in #556
• Edit confirm reporter settings msg by @oraclown in #557
• Move signature account to report cmd by @oraclown in #558
• Handle no mainnet config by @oraclown in #559
• Update docs from workgroup 2 by @oraclown in #567
• Add linux install instructions & update docker steps by @oraclown in #568
• Fix tips/ tests by @akremstudy in #569
• Small docs update by @oraclown in #570
• Added function to check if timestamp is valid by @akremstudy in #571
• Fix no strerr attribute in BittrexSpotPriceSource by @oraclown in #573
• Update version & core dep by @oraclown in #574

Full Changelog: v0.1.4...v0.1.5