core: Add Consensus to replace core.Blocklattice (#35)

* Make Sequencer return slice of blocks.

* Fix naming issue

The function 'getHeightVecto' would return ackingStatusVector.

* Fix comment error.

* Add methods to collect info when proposing blocks.

* Add test.App

* Add test.Gov

* Move this type to core.types to avoid cyclic import.

* Add core.Consensus

* Move getMedianTime, interpoTime to util

These functions are not depending on members of core.consensusTimestamp and
is required when testing core.Consensus.

* Make sure types.Block.Clone would copy critical fields.

* Remove core.blocklattice

* Define 'infinity' in core/total-ordering

This definition is defined in core/blocklattice originally.

* Fix a bug when processing the same block twice.

* Integrate simulation with core.Consensus

core.Consensus is a replacement of core.Blocklattice

* Fix the comment to use sigular form.

* Move lock mechanism to sub modules.

* phi should be 2*fmax+1

* Fixup: should aborting when the validator is added

* Fix for new block fields

* Fix the bug that the total ordering sequence is wrong.

1 files changed, 4 insertions, 2 deletions

diff --git a/core/application.go b/core/application.go
index edeb686..763954d 100644
--- a/core/application.go
+++ b/core/application.go
@@ -27,8 +27,10 @@ import (
 // Application describes the application interface that interacts with DEXON
 // consensus core.
 type Application interface {
-	// TotalOrderingDeliver is called when the total ordering algorithm deliver
-	// a set of block.
+	// StronglyAcked is called when a block is strongly acked.
+	StronglyAcked(blockHash common.Hash)
+
+	// TotalOrderingDeliver is called when the total ordering algorithm deliver // a set of block.
 	TotalOrderingDeliver(blocks []*types.Block, early bool)
 
 	// DeliverBlock is called when a block is add to the compaction chain.