Changelog for QGIS 2.16.0
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* General : Copying features in GeoJSON format

* General : Store spatial bookmarks in project files

* General : Support for GNSS GNRMC messages

* General : Paste GeoJSON features directly into QGIS

* General : Map tip improvements

* General : Desktop MIME icons for QGIS file types

* Documentation : Authentication system's documentation in users manual

* Documentation : QGIS 2.14 Documentation

* User Interface : Improvements to map zooming

* User Interface : Redesigned interactive gradient editor

* User Interface : Improved color pickers

* User Interface : Improvements to calendar popups

* User Interface : Choice of default view for the attribute dialog

* User Interface : Copy cell contents from attribute table

* User Interface : Improved HiDPI support

* User Interface : Map canvas magnifier

* User Interface : Improved map select tool behaviour

* Symbology : New accessibility and low vision symbols

* Symbology : New "Filled marker" symbol layer type

* Symbology : Outline setting for font markers symbol

* Symbology : More control over centroid fill point rendering

* Symbology : New simple marker symbols

* Symbology : Control outline join style for simple, ellipse, and font markers

* Symbology : New map tool for interactively setting point symbol offset

* Symbology : Style Dock

* Symbology : Arrow symbol layer

* Symbology : "No symbol" renderer

* Labelling : Labeling map tools now work with rule-based labeling 

* Diagrams : Legend entries for diagram size

* Diagrams : Diagrams behave like labels and can be managed from toolbar

* Diagrams : Unit selection for outline width

* Rendering : New options for on the fly simplification

* Rendering : Quantile based classification for raster layers

* Rendering : Live hillshade renderer

* Print Layouts : New tools for drawing polygons and polylines

* Print Layouts : Relative links in composer labels

* Print Layouts : Georeference outputs (eg PDF) from composer

* Print Layouts : Easier use of HTML in labels

* Print Layouts : Composer maps now auto-update with presets

* Print Layouts : Parameterized svg support for composer svg images

* Print Layouts : Embed atlas features into composer HTML source as GeoJSON

* Digitising : "Repeating" locking mode for constraints

* Digitising : Extend linestring geometries with reshape tool

* Digitising : Segmentation tolerance

* Data Management : Multiple columns in attribute forms

* Data Management : Forms view: side column now sortable

* Data Management : Control over attributes to export when saving a vector layer

* Data Management : Constraints on widgets

* Data Management : New configuration options for attribute table

* Data Management : Relation reference widget: shortcut for adding new values

* Data Management : DXF export improvements

* Data Management : Top level widgets in drag and drop designer

* Data Management : Create GeoPackage layers

* Data Management : Form based select and filter

* Data Management : Edit attributes of multiple features simultaneously

* Layer Legend : New option to zoom to a layer's visible scale range

* Analysis Tools : More distance units

* Analysis Tools : Named parameters in expressions

* Analysis Tools : Show curve point radius in info tool

* Analysis Tools : fTools plugin has been replaced with Processing algorithms

* Analysis Tools : Changes to expressions

* Analysis Tools : Statistics for string and date fields

* Analysis Tools : Aggregate support for expressions

* Processing : Support for expressions and variables

* Processing : Preconfigured algorithms

* Processing : Use of authentication manager in PostGIS related algorithms

* Processing : Set point locations by clicking on canvas

* Processing : Create a plugin with script-based algorithms from the toolbox

* Processing : Support for writing tables with no geometry

* Processing : Additional GRASS algorithms in processing

* Data Providers : OGR datasets are opened in read-only mode by default

* Data Providers : Support for DB2 databases

* Data Providers : Refresh Postgres materialized views in db manager

* Data Providers : Save styles in MS SQL and Oracle databases

* Data Providers : Rename fields in layers

* Data Providers : OGR FID attribute shown

* Data Providers : Make readOnly mode of vector layers configurable in project

* Data Providers : Basic support for Oracle Workspace Manager

* Data Providers : Massive improvements to WFS Provider

* Data Providers : Improved handling of Postgres DOMAIN type fields 

* Data Providers : Generation of default values on Postgres layers "just in time"

* Data Providers : ArcGIS Map and Feature REST services

* QGIS Server : Redlining support in GetMap and GetPrint

* QGIS Server : Default datum transformation for server

* Plugins : Refreshed globe plugin

* Plugins : Globe: Vertical exaggeration for DTM

* Plugins : Globe: Vector support

* Plugins : Globe: Extrude objects

* Plugins : API: Add pages to vector layer properties

* Programmability : Plugins can add pages to vector layer properties

* Programmability : Embedded widgets in layer tree

* Programmability : New PyQGIS classes in 2.16

* Notable Fixes : QGIS Paid Bugfixing Programme