Fix imprintables.rake task, add spec

Add hexcode:string to colors
Imprintable has_many imprintable_categories (couldn't figure spec though)
Merge branch 'develop' of https://github.com/AnnArborTees/softwear-crm into develop-david
Fix imprintables rake task and spec
Merge branch 'develop' of https://github.com/AnnArborTees/softwear-crm into develop-david
Update gitignore
Merge branch 'develop' of https://github.com/AnnArborTees/softwear-crm into develop