(DOCSP-10906) Release notes v1.15.0 (#366)

* Release notes 1.15

Author: zach-carr

source/bin-data.txt

@@ -32,6 +32,8 @@ date.
    values, categorized into a classification. Examples of discrete
    data include eye color and the number of students in a class.
 
+.. _bin-date-fields:
+
 Bin Date Fields
 ---------------
 

source/release-notes.txt

@@ -10,6 +10,55 @@ Release Notes
    :depth: 1
    :class: singlecol
 
+|charts| on |service| v1.15.0
+-----------------------------
+*Released June 23, 2020*
+
+Improvements in this release:
+
+- Enables downloading chart data from the dashboard view 
+  of a chart.
+
+- Invalid queries now display detailed error messages in the chart 
+  builder.
+
+- Enables setting a delimiter when using the ``concat`` 
+  :ref:`array reduction option <array-reduction>`.
+
+- Adds new *Week of the Year* option when 
+  :ref:`binning date values <bin-date-fields>`.
+
+- :ref:`Donut <donut-chart-ref>` charts can now be created from 
+  multiple fields.
+
+- Charts with binned numeric or date values now show gaps for empty 
+  bins.
+
+- Collection information is now visible when adding data sources.
+
+- Removes the step to set permissions when creating a data source.
+
+- Updates visuals across the |charts| application.
+
+Bug fixes in this release:
+
+- Fixes an issue where injected embedding filters were not properly 
+  considered when retrieving chart data from the cache.
+
+- Fixes an issue where errors that occurred while sampling fields did 
+  not display in the chart builder.
+
+- Fixes an issue where the chart builder query bar did not appear 
+  dimmed when a dialog was open.
+
+- Changes the IFrame embedding parameter to ``autoRefresh`` to improve 
+  consistency with SDK property (the previous ``autorefresh`` syntax 
+  still works).
+
+- Fixes an issue where embedded charts sometimes rendered with the 
+  incorrect font.
+
+
 |charts| on |service| v1.14.0
 -----------------------------
 

source/rich-schema-support.txt

@@ -57,6 +57,8 @@ adding an array field to an :ref:`encoding channel
 process the data in the best way for your visualization. The following
 array reduction options are available:
 
+.. _array-reduction:
+
 General Array Reduction Options
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~