buildout recipe to create scripts to run testrepository.

## Project description

testr recipe
============

This allows you to easily add a testrepository script to your buildout
project. This really only means that the user doesn't have to have
testr on their path, and they can just use ./bin/test or simlar.

This works very similarly to zc.recipe.testrunner, and in fact borrows
most of its code from there.

A sample buildout configuration would be::

[buildout]
develop = .
parts = test

[test]
recipe = testr_recipe
script = test

which will have ./bin/test run using the .testr.conf in your root
dir.

These are the options you can use:

* script: define the name of the script to create, if not passed
then the name of the section will be used.
* working-directory: if somewhere other than the root of the project
should be used.
* environment: the name of a section containing pairs of values to
put in the environment for the test run, e.g.

::

[test]
recipe = testr_recipe
enironment = testenv

[testenv]
foo = bar
zap = zang

* initialization: a string containing python code to put in the test
script before testr is run.
* executable: the python executable to put in the #! of the script.
* defaults: a list of options to prepend sys.argv for testr.
These are specified as Python source for an expression yielding a list,
typically a list literal. One thing you can do with this is::

[buildout]
parts = test testr

[testr]
recipe = testr_recipe

[test]
recipe = testr_recipe
defaults = ["run"]

which will make ./bin/test run the tests, and allow you to use
./bin/testr to access all the features of testr.

Creating the .testr.conf automatically
--------------------------------------

have it create the .testr.conf for you.

[testr]
recipe = testr_recipe
test-packages = mypackage
interpreter = python

Future enhancments:

* Maybe automatically doing "testr init" when setting up the project, so that
./bin/test works straight away.

## Project details

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