* Implementation of graffiti flag without tests.
* Updated to pass graffiti as string instead of []byte all the way to the ProposeBlock RPC call. This ensures that the ToBytes32() call is handled in ProposeBlock as opposed to relying on the caller to ensure that the value passed is only 32 bytes. This adds work by doing that conversion on each proposed block for a static value of graffiti, but it also helps protect against an RPC call to ProposeBlock that has more than 32 bytes for graffiti.
* Added test case for validator.
* Added GraffitiFlag to validate usage test.
* Updated data structures and logic to convert graffiti flag from string to byte array earlier in the process. Now converting when setting up ValidatorService.
* Updated test case to correctly set up validator using byte array.
* Merge branch 'master' into graffitiFlag
* coldstart flags for validator
* WIP beacon node flags
* wip beacon chain, flag fix in validator, arg fix in validator
* checkpoint
* Added interop service
* working on mock chainstart
* save the state lol
* fix tests
* Save genesis validators
* gaz
* fix validator help flags
* WaitForChainStart actually waits for genesis time
* cold start fixes
* cache
* change back
* allow for genesis state too
* remove logs
* increase mmap size
* dont process if head doesn't exist
* add 10ms tolerance
* enable libp2p debug at debug, fix pubsub
* works with checkpt
* initialize justified and finalized in db
* Removed preloadStatePath from blockchain service
* Clean up
* Write to disk for now post state
* revert b466dd536f8eadbdae2264a545a755370223d917
* Builds
* Only RPC test fails now
* use minimal config, no demo config
* clean up branch
* Lint
* resolve lint
* more lint fixes
* lint
* fix viz
* Fixing RPC test
* skip before epoch 2
* RPC time out
* Fixed ordering
* rename
* remove some dbg statements
* ensure index is correct
* fix some panics
* getting closer
* fix tests
* Fix private key
* Fixed RPC test
* Fixed beacon chain build for docker
* Add interop.go to validator go_image
* Fixed docker build
* handle errors
* skip test, skip disconnecting peers
* Fixed docker build
* tolerance for attestation processing
* revert copy
* clearer err message parse
* fix launching from dep contract
