Set the default behavior of the unit test test runs to not modify the
configuration. This speeds up the quick runs of the tests, as it does not
disable the caching of the OutputConnectors. Thorough tests that run the
test suite with repetitions still run the subsequent runs with a modified
config.
Added helper function that creates a counting number string ("1st", "2nd",
"3rd", "4th" ...) from integer numbers.
Bugfixes for some plotting classes:
 - remove deprecated and forgotten documentation and constructor parameters
 - setting the y-axis scale to linear or logarithmic works as expected now
FindHarmonicImpulseResponse, a class for getting the impulse response of
a higher order harmonic from an impulse response that has been measured
with an exponential sweep.
The ConvolveSignals class now has the convolution mode SPECTRUM, which
calculates the convolution in the frequency domain.
Changed the behavoir of the CorrelateSignals class:
 - added SPECTRUM mode to calculate the correlation in the frequency domain
 - by default, the correlations are shifted circularly so that the
   zero-time is the firs sample of the output Signal
Changes to the nonlinear Thiele-Small-parameter auralization.
 - Changed formula for the transfer function
 - Slight calculation speedups
 - It is possible to specify a regularization value and a warp frequency
   now, to minimize certain simulation errors
Changed the names of the "Voicecoil"-method of the
ThieleSmallParameterInterpretation to "VoiceCoil", so the names match those
of the ThieleSmallParameters class.
Changed the expression "membrane displacement" to "membrane excursion" in
the loudspeaker related classes, as this seems to be the more common
expression.
Merge branch 'next' into untested
Changed version number in setup.py to 0.10
Merge branch 'next' into untested