added merchant fixture dupe line, wrote merchant repo tests, built merchant repo class and all of its methods
fixed typos in merchant repo test and built transaction repo test, also added dupe line to trans repo fixture
in the middle of working out test failures in transaction repo test
fixed all tests except nil in cc exp
changed nil to empty string, still not passing
refactored metaprogramming block to include all attrs, and select with to_s
removed tests and findby methods for cc exp per katrinas suggestion
Merge branch 'master' into merchant_and_transaction_repo_work