Create Z.Q.L class
Test for ZQL
Remove unused dependency
Add .cache to ignore
Support ';' separated query execution
Merge branch 'library'

Conflicts:
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zai/ColumnSpec.java
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zai/Input.java
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zai/MetaApplication.java
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zai/ZeppelinApplication.java
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zai/ZeppelinApplicationManager.java
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zai/builtin/Chart.java
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zai/builtin/Sql.java
	zeppelin-core/src/main/java/com/nflabs/zeppelin/zrt/ZeppelinRuntime.java
	zeppelin-core/src/test/java/com/nflabs/zeppelin/zai/builtin/SqlTest.java
remove unnecessary files