* FunctionSlot.py (FunctionSlot.clear): Clear funcWeights, too.
Fix typo: "lenght" -> "length".
Fix grammatical errors in docstrings.
* Mutators.py: Clean up listSize arithmetic. It's cleaner to set
  listSize to len(genome) and subtract one on calls to randint than to
  subtract one from the length and then re-add one everywhere else.
* GAllele.py: Change output "<n> position" to "position <n>" (grammar).
* pyevolve/Consts.py: Fix typo in minmaxType example.
* Mutators.py (G1DListMutatorAlleleGaussian): New function. The existing
  allele-based mutator is not particularly useful because
  getRandomAllele() returns a new random allele value taken from the
  uniform distribution (when real=True). A Gaussian mutator works better
  in some cases.

  Note that only a single value range is supported.
Merge pull request #59 from bje-/master

* FunctionSlot.py (FunctionSlot.clear): Clear funcWeights, too.