changes to the modification system
fix for authorize.net AIM payment module not processing digital orders
more modification system done.

I think i have got a handle how to do this.
modification system
more modification system updated
setting issue fix
more modification work done
modification
modification
Category and Product is Ready for seo url enabled

hi, this is Category and Product is Ready for seo url enabled
thanks,
add canonical to category
add canonical to manufacture_info
modification
modification
Merge pull request #530 from fahmi182/master

sample category and product is ready for seo url enabled
more modification system done
Fixed if enable smtp mail, utf8 character errors in header.
Merge pull request #533 from e-piksel/master

Fixed if enable smtp mail, utf8 character errors in header.
Fix E_NOTICE showing when product keyword is not set
Merge pull request #535 from gtoniser/master

Fix E_NOTICE showing when product keyword isn't set