Update to version 0.4 (v0.4)

CHANGELOG.rst

 Change log
 ----------
 
+0.4 (2019-08-21)
+~~~~~~~~~~~~~~~~
+
+- Finish documentation
+    - Also includes some ``doctests`` to test for edge cases
+- Introduce develop branch to only have major version at master branch
+- Add relative error calculation
+- Add channel flow example (to test for Knudsen paradox)
+- Fix error calculation for higher-order Ansatz function
+    - The previous error was based on DOFS (P2 elements therefore differ), the new error is based on vertex values
+
 0.3 (2019-08-11)
 ~~~~~~~~~~~~~~~~
 

docs/conf.py

@@ -24,7 +24,7 @@ copyright = '2019, Lambert Theisen'
 author = 'Lambert Theisen'
 
 # The full version, including alpha/beta/rc tags
-release = '0.3'
+release = '0.4'
 
 # -- General configuration ---------------------------------------------------