Adding spark to Makefile and Contact.md (#11)

Author: hbxie

docs/about/contact.md

@@ -7,6 +7,7 @@ If you have any issues with any of the particular Bullet sub-components, feel fr
 |               |        |
 | ------------- | ------ |
 | Storm         | [https://github.com/bullet-db/bullet-storm/issues](https://github.com/bullet-db/bullet-storm/issues)     |
+| Spark         | [https://github.com/bullet-db/bullet-spark/issues](https://github.com/bullet-db/bullet-spark/issues)     |
 | Web Service   | [https://github.com/bullet-db/bullet-service/issues](https://github.com/bullet-db/bullet-service/issues) |
 | UI            | [https://github.com/bullet-db/bullet-ui/issues](https://github.com/bullet-db/bullet-ui/issues)           |
 | Record        | [https://github.com/bullet-db/bullet-record/issues](https://github.com/bullet-db/bullet-record/issues)   |

docs/quick-start/spark.md

@@ -132,7 +132,7 @@ $BULLET_SPARK/spark-2.2.1-bin-hadoop2.7/bin/spark-submit \
 
 ```
 
-The Backend will usually be up and running usually within 5-10 seconds. Once it is running you can get information about the Spark job in the Spark UI, which can be seen in your browser at ```http://localhost:4040``` by default. The Web Service will now be hooked up through the Kafka PubSub to the Spark backend. To test it you can now run a Bullet query by hitting the Web Service directly:
+The Backend will usually be up and running usually within 5-10 seconds. Once it is running you can get information about the Spark job in the Spark UI, which can be seen in your browser at [http://localhost:4040](http://localhost:4040) by default. The Web Service will now be hooked up through the Kafka PubSub to the Spark backend. To test it you can now run a Bullet query by hitting the Web Service directly:
 
 ```bash
 curl -s -H 'Content-Type: text/plain' -X POST -d '{"aggregation": {"size": 1}}' http://localhost:9999/api/bullet/sse-query

examples/Makefile

@@ -3,6 +3,7 @@ all: clean build
 clean:
 	rm -rf examples_artifacts.tar.gz bullet-examples
 	cd storm && mvn clean
+	cd spark && mvn clean
 
 build-storm:
 	mkdir -p bullet-examples/backend/storm