Add help text for new data query module

modules/dataquery/help/dataquery.md

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+# Data Query
+
+This module allows you to query data within LORIS.
+There are three steps to defining a query:
+
+- First, you must select the fields that you're
+  interested in on the **Define Fields** page.
+- Next, you can optionally define filters on the
+  **Define Filters** page to restrict the population
+  that is returned.
+- Finally, you view your query results on the **View Data** page
+
+The **Next Steps** on the bottom right of your screen always the
+context-sensitive next steps that you can do to build your query.
+
+Your recently run queries will be displayed in the **Recent Queries** panel
+on the first screen of the module (you can return to it at any time by using
+the LORIS breadcrumbs.) Instead of building a new query, you can reload a
+query that you've recently run by clicking on the load icon next to the query.
+
+Queries can be shared with others by clicking the share icon.
+This will cause the query to be shared with all users who
+have access to the fields used by the query. It will display
+in a **Shared Queries** panel below the **Recent Queries**.
+
+You may also give a query a name at any time by clicking the
+pencil icon. This makes it easier to find queries you care
+about by giving them an easier to remember name that can be used
+for filtering. When you share a query, the name will be shared
+along with it.
+