tests and validations for detail model
added product colors, refactored some tests
allsize tests passing, stubborn failures in products and custys
got all image model tests passing
modified gitignore to ignore seed file
weird tests commented out, others passed
righted wrongs of db, added details to product#show
image model in place for product#show
changes in the direction of an image gallery in products#show
renamed file
code for image gallery in place, but not quite working yet
added simplecov for test coverage