added tips for installation and configuration
updated version to 2.0.2
Merge pull request #64 from bibich/improvements

added tips for installation and configuration
Added brand related documentation.
Added brand substitutions
Added the standardized form field generation description
Merge pull request #65 from roadster31/brands

Added brand related documentation.
Added loop specific output parameters
Added some doc on loops
Merge pull request #66 from roadster31/accessory

Added loop specific output parameters
Added some doc on loops
Fixed incomplete loop documentations
added missing substitutions
Merge branch 'improvements' of github.com:bibich/thelia.github.io into improvements
Added coupon loop documentation
Merge pull request #68 from roadster31/in_use

Added coupon loop documentation
Update product_sale_elements.md

Added $IS_DEFAULT, $REF
Merge pull request #67 from bibich/improvements

- small fixes on loop
- added missing substiutions
loop doc
   - getArgDefinitions instead of defineArgs
   - bad link on localhost
   - loop name must be lowercase
   - missing 'use'
   - buildModelCriteria must return a query, not a collection
Merge pull request #71 from griotteau/patch-loop

error in loop documentation