* WIP possible discovery service impl
* Adds discovery service to CaptPlanet
* Updates the config and server for discovery service
* updates testplanet to use discovery package
* update satellite imports
* Removes unnecessary cache test
* linter fixes
* adds discovery startup to captplanet
* invoke refresh
* updates to discovery refresh cycle
* Make implementation more consistent with previous implementation
* add wait before trying to upload
* sleep a bit more
* remove kademlia bootstrap
* updates
* remove comments
* Pulls statdb stats into overlay cache whenever cache.Put() is called
* Updates overlay.FindStorageNodes()/overlayClient.Choose() to filter based on node stats
* Updates overlay.FindStorageNodes()/overlayClient.Choose() to exclude duplicate IP addresses
* preparing for use of `customtype` gogo extension with `NodeID` type
* review changes
* preparing for use of `customtype` gogo extension with `NodeID` type
* review changes
* wip
* tests passing
* wip fixing tests
* more wip test fixing
* remove NodeIDList from proto files
* linter fixes
* linter fixes
* linter/review fixes
* more freaking linter fixes
* omg just kill me - linterrrrrrrr
* travis linter, i will muder you and your family in your sleep
* goimports everything - burn in hell travis
* goimports update
* go mod tidy
