* [NOD-423] Rename BestBlock to SelectedTip
* [NOD-423] Implement GetSelectedTip RPC command
* [NOD-423] Add help to getSelectedTip command
* [NOD-423] Fix getSelectedTip test
* [NOD-423] Fix tests so they would compile. These tests will need to be rewriten at some point.
* [NOD-423] Make integration test compile. Test need to be revisited
* [NOD-423] Rename variables
* [NOD-423] Change comment s about best block to selected tip.
* [NOD-423] Update comment
* [NOD-423] Change height to bluescore
* [NOD-275] Moved getBlockTemplate and related functionality to a separate file.
* [NOD-275] Started moving handlers to separate files.
* [NOD-275] Fixed merge errors.
* [NOD-275] Moved all handlers out of rpcserver.go.
* [NOD-275] Moved non-shared functions out of rpcserver.go.
* [NOD-275] Moved handleGetAllManualNodesInfo to a separate file.
* [NOD-275] Moved handlers out of rpcwebsocket.go to separate files.
* [NOD-275] Fixed import error.
* [NOD-275] Renamed all handler files to include underscores.
* [NOD-275] Moved common rpc helper functions to common.go.
