fix - sort tx inputs/outputs (#533) (#542)

* added debug logging to see what we're doing in save_pos_index

* add counts to logging

* make sure inputs/outputs in tx are sorted
tweak debug logging

* DRY up sorting of inputs/outputs/kernels via a simple sort() in ser/deser

* add explicit validation fo sort order during tx and block validation

* sort order consensus rule for inputs/outputs/kernels in blocks

* we want a max of 10*num_peers blocks during sync...
not min

* fix test imports

chain/src/sumtree.rs

@@ -323,12 +323,28 @@ impl<'a> Extension<'a> {
 	}
 
 	fn save_pos_index(&self) -> Result<(), Error> {
+		debug!(
+			LOGGER,
+			"sumtree: save_pos_index: outputs: {}, {:?}",
+			self.new_output_commits.len(),
+			self.new_output_commits.values().collect::<Vec<_>>(),
+		);
+
 		for (commit, pos) in &self.new_output_commits {
 			self.commit_index.save_output_pos(commit, *pos)?;
 		}
+
+		debug!(
+			LOGGER,
+			"sumtree: save_pos_index: kernels: {}, {:?}",
+			self.new_kernel_excesses.len(),
+			self.new_kernel_excesses.values().collect::<Vec<_>>(),
+		);
+
 		for (excess, pos) in &self.new_kernel_excesses {
 			self.commit_index.save_kernel_pos(excess, *pos)?;
 		}
+
 		Ok(())
 	}