Update changelog for v5.0b1 release

CHANGELOG.md

@@ -1,5 +1,25 @@
 # NURBS-Python Changelog
 
+## 5.0b1 released on 2018-12-21
+
+* Simplified `abstract` module and moved all abstract classes to their relevant modules
+* Removed `curvept` and `surfpt` methods. Use `evaluate_single` instead.
+* Added an option to enable/disable knot vector normalization. Initialize the class with `normalize_kv=False` to disable knot vector normalization.
+* Added B-spline and NURBS volume support with visualization, `BSpline.Volume` and `NURBS.Volume`
+* Refactored `convert` module to improve reusability and add support to volumes
+* Refactored `exchange` module to improve reusability
+* Rhino file export and import options, `export_3dm` and, `import_3dm` in `exchange` module
+* Added `exchange.export_vmesh` for exporting NURBS volumes
+* Add Jinja2 template support for `exchange.import_txt`
+* Update the name of `utilities.check_uv` function to `utilities.check_params`
+* Refactored `utilities` module and moved some functions to `linalg` module
+* `VisMPL.VisSurfTriangle` is now an alias for `VisMPL.VisSurface`
+* `fitting` module for curve and surface global interpolation + approximation (fitting)
+* `construct` module for constructing surfaces and volumes + extracting surfaces and curves
+* `linalg` module (generated by splitting `utilities` module)
+* `VisVoxel` and `VisVolume` classes for volume visualization
+* `VisVTK` visualization module
+
 ## 4.4.4 released on 2018-12-20
 
 * Fix PyPI description