Merge remote-tracking branch 'origin/master' into orderspec

# Conflicts:
#	src/blockchain/abi.js

src/blockchain/wallet.js

@@ -187,6 +187,16 @@ export async function cancelOrder(vault, orderIndex) {
   })
 }
 
+export async function cancelAll(vault) {
+  pendTransaction(async (signer)=> {
+    const contract = contractOrNull(vault, vaultAbi, signer)
+    if( contract === null ) {
+      console.error('vault contract was null while canceling order', vault)
+      return null
+    }
+    return await contract.cancelAll()
+  })
+}
 
 export function flushOrders(vault) {
   for( const order of pendingOrders )