update changes

.gitignore

@@ -5,6 +5,7 @@
 *~
 \#*
 build/
+dist/
 inputs.auto
 .noseids
 

CHANGES.md

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+
+# 4.0
+
+  This begins a new development campaign, with the source updated to
+  conform to a standard python packaging format, allowing us to put
+  it up on PyPI, and install and run from anywhere.
+
+# 3.1
+
+  This is essentially the version from JOSS
+
+# 3.0
+
+  This was the transition to Numba
+
+# 2.2
+
+  * added shallow water solver
+
+  * added particles support
+
+# 2.1
+
+  * documentation switched to Sphinx
+
+  * extensive flake8 clean-ups
+
+  * travis-ci for unit test (with 79% coverage)
+
+  * SDC compressible method added
+
+# 2.0
+
+  This is the state of the project toward the end of 2017.
+  4th order finite-volume methods were just introduced.