More detailed changelog:

- SymPy works with NumPy out of the box (commit 1, 2)
- RootOf implemented (commit)
- Lambda support works now (commit)
- heuristic Risch method improved (commit 1, 2, 3, 4, 5)
- cancel function implemented (commit)
- sqrt(x) is now equivalent to
`x**(1/2)`(commit 1, 2) - Derivative is now unevaluated (commit)
`list2numpy()`implemented (commit)- series expansion of hyperbolic functions fixed (commit)
- sympify('lambda x: 2*x') works, plus other fixes (commit 1, 2, 3)
- simple maxima parser implemented (commit)
`sin(x)[0]`idiom changed to`sin(x).args[0]`(commit)`sin(x).series(x, 5)`idiom changed to`sin(x).series(x, 0, 5)`(commit)- caching refactored (commit 1, 2, 3, 4, 5, 6, 7, 8, 9)
- 2D plots now don't rotate in 3D, but translate instead (commit)
- many bug fixes, see the Mercurial history for details

The following people have contributed to this release:

- Kirill Smelkov
- Mateusz Paprocki
- Fredrik Johansson
- Jaroslaw Tworek
- Saroj Adhikari
- Andrej Tokarčík
- David Marek
- Or Dvory
- Bernhard R. Link
- Ondřej Čertík