Hypothesis

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A small patch release for a bug in the new executors feature. Tests which require
doing something to their result in order to fail would have instead reported as
flaky.

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Codename: Finders keepers.

A bunch of new features and improvements.

* Provide a mechanism for customizing how your tests are executed.
* Provide a test runner that forks before running each example. This allows
better support for testing native code which might trigger a segfault or a C
level assertion failure.
* Support for using Hypothesis to find examples directly rather than as just as
a test runner.
* New streaming type which lets you generate infinite lazily loaded streams of
data - perfect for if you need a number of examples but don't know how many.
* Better support for large integer ranges. You can now use integers_in_range
with ranges of basically any size. Previously large ranges would have eaten
up all your memory and taken forever.
* Integers produce a wider range of data than before - previously they would
only rarely produce integers which didn't fit into a machine word. Now it's
much more common. This percolates to other numeric types which build on
integers.
* Better validation of arguments to given. Some situations that would
previously have caused silently wrong behaviour will now raise an error.
* Include +/- sys.float_info.max in the set of floating point edge cases that
Hypothesis specifically tries.
* Fix some bugs in floating point ranges which happen when given
+/- sys.float_info.max as one of the endpoints... (really any two floats that
are sufficiently far apart so that x, y are finite but y - x is infinite).
This would have resulted in generating infinite values instead of ones inside
the range.

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Codename: Nothing to see here

This is just a patch release put out because it fixed some internal bugs that would
block the Django integration release but did not actually affect anything anyone could
previously have been using. It also contained a minor quality fix for floats that
I'd happened to have finished in time.

* Fix some internal bugs with object lifecycle management that were impossible to
hit with the previously released versions but broke hypothesis-django.
* Bias floating point numbers somewhat less aggressively towards very small numbers

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Codename: No-one mention the M word.

* Unicode strings are more strongly biased towards ascii characters. Previously they
would generate all over the space. This is mostly so that people who try to
shape their unicode strings with assume() have less of a bad time.
* A number of fixes to data deserialization code that could theoretically have
caused mysterious bugs when using an old version of a Hypothesis example
database with a newer version. To the best of my knowledge a change that could
have triggered this bug has never actually been seen in the wild. Certainly
no-one ever reported a bug of this nature.
* Out of the box support for Decimal and Fraction.
* new dictionary specifier for dictionaries with variable keys.
* Significantly faster and higher quality simplification, especially for
collections of data.
* New filter() and flatmap() methods on Strategy for better ways of building
strategies out of other strategies.
* New BasicStrategy class which allows you to define your own strategies from
scratch without needing an existing matching strategy or being exposed to the
full horror or non-public nature of the SearchStrategy interface.

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Codename: Blast-off!

There are no code changes in this release. This is precisely the 0.9.2 release
with some updated documentation.

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Codename: T-1 days.

* floats_in_range would not actually have produced floats_in_range unless that
range happened to be (0, 1). Fix this.