Version tracking working via paper trail gem; added deep_diff function to core_ext hash.rb, which will allow comparison of two hashes; ALL sow numbers are precise to 4 decimal places by default now.
Updated Readme
Implemented a Version History method in Reports which provides a JSON-like iterative response for all of a Report's history (Report Changes, Project Changes, Deliverable Changes -- including sow assignments)
removed some comments from Report model