stack: order the adjective of changeset
The new order give more interesting result:
* base current
* base unstable
* current unstable
It seems more harmonious this way. Base seems the most core and immutable
adjective describing the element. Then current is a volatile but important one.
Finally, unstable is less information than current, so it goes last.
Doc is generated with sphinx.
You can generate the doc with:
```
make
```
# Tutorials
For updating the tutorials, you need to have the docgraph extension installed
(https://pypi.python.org/pypi/hg-docgraph).
Then run the test-topic-tutorial.t and test-tutorial.t to update the output if
needed.
You'll need the dot binary (likely installed by the graphviz package in your
package manager) in order to have graphviz graphs rendered in the html output.
Simply run make in the docs directory should takes care of the conversion of
the tutorial .t files into .rst files. Then sphinx should do the rest of the
jobs by rendering graphviz graphs.