incremented development version number
refactored CentromereFindingMethod into smaller chunks
Implemented background subtraction by thresholding on mean distance to N closest centromeres.  Closes #55.
Fixed a problem with the deschmutzerizer not running that arose from the switch to AnalysisMetadata objects.
Fixed a problem with getting the quantification output filename in the deschmutzerizer.  Fixes #57.
Merge branch 'develop' to pick up analysis metadata changes.
changed background subtraction so that it doesn't cause grouping of centromeres into the same cell and thus averaging in the summary file
disabled grouping by cell in deschmutzerizer due to bad interaction with background subtraction masks
changed pom to add rspec plugin, added a test spec
added rspec to test phase and configured test directory
added image coordinate spec and associated helpers
added image factory spec, corrected bug in creating image from buffered image
WIP on generated filter regression tests
fixed implementation of VoronoiFilter to run in reasonable time
updated commons math to 3.1.1
added filter regression tests for those filters not requiring additional input.  Fixed an issue with the VariableSizeMeanFilter by adding a default subdivision limit.  Fixes #52.
added metric to calculate region areas and perimeters
added Rakefile for running tests not through maven to enable better error messages
seeded watershed filter optimizations
fixed indentation