Edit `BoundedNumericProperty.check` to use "%f" rather than "%d" for float max/min in ValueError error message.

If the supplied value is outside the bounds of BoundedNumericProperty, a ValueError is raised by `BoundedNumericProperty.check`.  However, the error message inside the ValueError is incorrect if the max or min are floats, since the error message uses "%d" rather than "%f".

This means for example that if the min is 0.6 and you supply a value of 0.4, the error message will tell you that your value was below the minimum bound of "0", which is incorrect for 2 reasons.
Made UrlRequest decoding optional with parameter
Stopped empty accordian from accessing its first child when initialized
Document on_<action> args in kv.

Fix typos.
Merge pull request #1252 from Ian-Foote/kv_args_doc

Document on_<action> args in kv.
lang: fix re-raise exception for python 2 and 3 + correctly report line number now, and removing kivy.lib.debug module from flask.
tests: use a zip file that is extracted before the test is run for
unicode filenames. Workaround for bzr not supporting unicode filenames
Merge pull request #1257 from kivy/bzr_workaround

tests: use a zip file that is extracted before the test is run for
Clear version change documentation

The documentation of [RelativeLayout.py] (https://github.com/kivy/kivy/blob/master/kivy/uix/relativelayout.py#L21) says:

    .. versionchanged:: 1.7.0

        Prior to version 1.7.0 The :class:`RelativeLayout` was implemented as a
        :class`FloatLayout` inside a :class:`Scatter`.  This behaviour/widget has
        been renamed to `ScatterLayout`.  The :class:`RelativeLayout` now only
        supports relative position (and cant be roatated or scaled), so that the
        implemetation can be optimized and avoid the heavier calculations from
        :class:`Scatter` (e.g. inverse matrix, recaculating multiple properties,
        etc)

I was struggling why is it that it says it cannot be rotated or scaled?. I had a `Widget` that inherits from `RelativeLayout` in which I was able to `Rotate` and `Scale` without any problem. It took me quite a while to find out that the documentation only refers to multi-touch behaviour.
Added Spinner widget's kv lang to style.kv
Merge pull request #1262 from abhijangda/spinner

Added Spinner widget's kv lang to style.kv
Merge pull request #1249 from Aaron1011/empty_accordian_crash

Stopped empty accordian from accessing its first child when initialized
Update packaging-android.rst
two minor typos
fixed slightly awkward grammar
linked gihub source code, missing full stop
English idiom, missing full stop
English idiom
typo, linked to wikipedia for event programming
typos