[pull request] add south migrations since v0.9 for product app

Issue #1073 resolved
Tay Ray Chuan
created an issue

I've published this as [[http://bitbucket.org/rctay/satchmo/changeset/fd53e88bcd0b/ | 1526:fd53e88bcd0b]].

Migrations were generated for backward-incompatible changes that touched {{{product}}}; specifically, they are:

  • product attributes improvement: <<changeset 50284356fdf9>>
  • unique together constraint on CustomTextField feature: <<changeset 75a2ea838067>>
  • rename Discount.validProducts field: <<changeset dd135395e9ac>>