Make K_TIMEOUT configurable and rename

[jsocol]

Let's make K_TIMEOUT configurable via an environment variable, so that this stays generically useful but django can still set it.

TIMEOUT = os.env.get('SPHINX_TIMEOUT', 1)

Then Django can put, in settings:

os.env['SPHINX_TIMEOUT', 5)

That should work, if I understand the order of the imports. Will double test and implement.

[stephendonner]

+1