Update statdb args/return values to minimize structs
Simplify statdb.Update() to update all stats instead of an arbitrary subset determined by flags
Remove CreateIfNotExists logic from statdb.Update()
Simplify audit code structure
* intial changes to migrate statdb to masterdb framework
* statdb refactor compiles
* added TestCreateDoesNotExist testcase
* Initial port of statdb to masterdb framework working
* refactored statdb proto def to pkg/statdb
* removed statdb/proto folder
* moved pb.Node to storj.NodeID
* CreateEntryIfNotExistsRequest moved pd.Node to storj.NodeID
* moved the fields from pb.Node to statdb.UpdateRequest
ported TestUpdateExists, TestUpdateUptimeExists, TestUpdateAuditSuccessExists TestUpdateBatchExists
* 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
* fix audit stripe selector to work if last segment is smaller than stripe size
* fix audit bug related to indexing an incomplete list of nodes returned by overlay
