* [NOD-487] Implement a mechanism to gracefully shut down after a panic.
* [NOD-487] Fixed bad log.
* [NOD-487] Removed unused import.
* [NOD-487] Convert panic handlers from anonymous functions to methods.
* [NOD-443] Immediately request missing parents in API server sync
* [NOD-443] Add rpc client log to api server
* [NOD-443] Fix wrong ordering of pendingHeaders queue
* [NOD-443] Fix error comparision at TestNewHashFromStr
* [NOD-443] Make a separate handleMissingParentHeaders function
* [NOD-443] Change log level
* [NOD-443] Put handleMissingParentHeaders next to handleBlockHeader
* [NOD-443] Make handleBlockAddedMsg function
* [NOD-443] Make reusable missingParentsHashesStr string
* [NOD-443] Remove redundant 's'
* [NOD-443] Refactor to first get all blocks and then add them to database
* [NOD-443] Rename variables and functions, and remove redundant logs
* [NOD-443] Make fetchBlockAndMissingAncestors use block hash as an argument
* [NOD-443] Add log only for first orphan block
* [NOD-443] Fix wrong order of adding blocks to pendingBlocks
* [NOD-443] Write logs for all orphans
* [NOD-443] Log only missing parents that are not already fetched
* [NOD-443] Rename rawVerboseBlockTuple -> rawVerboseBlock
* [NOD-443] Make fetchBlock return *rawVerboseBlock
* [NOD-443] Rename rawVerboseBlock -> rawAndVerboseBlock
