DOC: added CHANGELOG file

CHANGELOG.md

@@ -0,0 +1,32 @@
+Changelog
+=========
+
+For unreleased changes please see the [README](README.md) file.
+
+
+Version 0.3
+-----------
+
+* MIGRATION: `Trajectory` classes need `get_frame_count` method
+* MIGRATION: removed `set_frame` method use new `frame` property
+* ADD: simple trajectory player
+* ADD: widget resizing support
+* ADD: picking support (gui info; `picked` property)
+* CODE: check for file existence in `FileStructure` and `SimpletrajTrajectory`
+
+
+Version 0.2
+-----------
+
+* MIGRATION: changed `get_string` to `get_structure_string`
+* MIGRATION: changed `get_coordinates` to `get_coordinates_list`
+* DOC: usage, interface classes
+* ADD: MDTrajTrajectory adaptor
+* CODE: added interface classes
+* CODE: suggested packages; mdtraj, simpletraj
+
+
+Version 0.1
+-----------
+
+* initial version, no release

README.md

@@ -1,7 +1,5 @@
-
 ![nglview](nglview.png)
 
-
 An IPython widget to interactively view molecular structures and trajectories. Utilizes the embeddable [NGL Viewer](https://github.com/arose/ngl) for rendering.
 
 Very much work in progress. Please contact me if you want to take part. Should work with Python 2 and 3. If you experience problems, please file an [issue](https://github.com/arose/nglview/issues).
@@ -216,6 +214,7 @@ Version 0.4dev
 
 * CODE: be less noisy when importing nglview
 * DOC: more usage examples, API description
+* DOC: added CHANGELOG file
 
 
 Version 0.3
@@ -240,10 +239,10 @@ Version 0.2
 * CODE: suggested packages; mdtraj, simpletraj
 
 
-Version 0.1
------------
+Older versions
+--------------
 
-* initial version, no release
+For changes in older versions please see the [CHANGELOG](CHANGELOG.md) file.
 
 
 License