wrote first version of csv writer. so far can only write to global csv file.
#67 - introduced CSVWriting in Evaluation framework
#61 #62 - added additional storage attributes to EvaluationFramework.evaluations dates and obj func name.
work on #67 - added new attributes to EvaluationWriter.
#67 - wrote code for detailed csv reporting for each evaluation. Detailed reporting is undertaken every ten steps at the moment
#67 now have vairable frequencies for csv and plot writing
#67 and #61 - now storing plots internally in memory in EvaluationFramework (see global list plots and its documentation in the code) for later reuse in showing them or writing them to files.
#67 - finished implementation of results and plots storing. See issue 67 and apsis.utilities.EvaluationWriter for documentation. Also for interest in #61
#67 - forgot to add EvaluationWriter.py to last commit. This commit contains mainly the code for plot storing and some refactoring in EvaluationWriter.
fixes #67 - moved new code for result storing into master branch