adding new CQL commands supported

Author: TheovanKraay

articles/cosmos-db/cassandra-support.md

@@ -140,6 +140,8 @@ Azure Cosmos DB supports the following database commands on Cassandra API accoun
 
 * CREATE KEYSPACE (The replication settings for this command are ignored)
 * CREATE TABLE 
+* CREATE INDEX (without specifying index name, and full frozen indexes not yet supported)
+* ALLOW FILTERING
 * ALTER TABLE 
 * USE 
 * INSERT 
@@ -174,7 +176,7 @@ Azure Cosmos DB supports role-based access control (RBAC) for provisioning, rota
 
 ## Keyspace and Table options
 
-The options for region name, class, replication_factor, and datacenter in the "Create Keyspace" command are ignored currently. The system uses the underlying Azure Cosmos DB’s [global distribution](global-dist-under-the-hood.md) replication method to add the regions. If you need the cross-region presence of data, you can enable it at the account level with PowerShell, CLI, or portal, to learn more, see the [how to add regions](how-to-manage-database-account.md#addremove-regions-from-your-database-account) article. Durable_writes can't be disabled because Azure Cosmos DB ensures every write is durable. In every region, Azure Cosmos DB replicates the data across the replica set that is made up of four replicas and this replica set [configuration](global-dist-under-the-hood.md) can't be modified.
+The options for region name, class, replication_factor, and datacenter in the "Create Keyspace" command are ignored currently. The system uses the underlying Azure Cosmos DB's [global distribution](global-dist-under-the-hood.md) replication method to add the regions. If you need the cross-region presence of data, you can enable it at the account level with PowerShell, CLI, or portal, to learn more, see the [how to add regions](how-to-manage-database-account.md#addremove-regions-from-your-database-account) article. Durable_writes can't be disabled because Azure Cosmos DB ensures every write is durable. In every region, Azure Cosmos DB replicates the data across the replica set that is made up of four replicas and this replica set [configuration](global-dist-under-the-hood.md) can't be modified.
 
 All the options are ignored when creating the table, except gc_grace_seconds, which should be set to zero.
 The Keyspace and table have an extra option named "cosmosdb_provisioned_throughput" with a minimum value of 400 RU/s. The Keyspace throughput allows sharing throughput across multiple tables and it is useful for scenarios when all tables are not utilizing the provisioned throughput. Alter Table command allows changing the provisioned throughput across the regions.