Revert Timm Decker's system breaking changes.
Add specs for Mws::Apis::Products, and asin methods.
Update .gitignore to include .rvmrc and tags.
Re add Products methods, remove unused list_pattern functionality, move params parsing from Query to Utils, and allow multi-market and multi-asin queries.
Merge pull request #2 from FrancisGX/timm_decker_fixes

Revert Timm Decker's system breaking changes.