Resolve #1925 by handling URL's with parameters

Resolve issue #1925 by stripping URL parameters from a file name if the file contains them.

Before:
```
from kivy.core.audio import SoundLoader
s = SoundLoader.load(r"https://dl.dropboxusercontent.com/s/31iff182wy99cp1/test.wav?dl=1&token_hash=AAEjMqwEdOBUPNBVfTsDPPQW_CZPNRBgRvBNiXpRxx5btA")
s.play()
[WARNING           ] [Audio       ] Unable to find a loader for <https://dl.dropboxusercontent.com/s/31iff182wy99cp1/test.wav?dl=1&token_hash=AAEjMqwEdOBUPNBVfTsDPPQW_CZPNRBgRvBNiXpRxx5btA>
```

After:
```
from kivy.core.audio import SoundLoader
s = SoundLoader.load(r"https://dl.dropboxusercontent.com/s/31iff182wy99cp1/test.wav?dl=1&token_hash=AAEjMqwEdOBUPNBVfTsDPPQW_CZPNRBgRvBNiXpRxx5btA")
s.play()
#No error, sound plays as expected
```