Merge pull request #210 from mespeche/master

Structure uniformization for Coupon
create test suite for FeatureAv object
fix test suite
create lang test suite
Update COPYRIGHT.txt

updating year in copyright
Update CONTRIBUTORS.txt

adding manu into contributors
create lost password email
Update order-invoice.html

There was an "s" after the string {intl l="Billing address"} line 207
Merge pull request #213 from stephaniepinet/master

Update order-invoice.html
fix test suite
coupon code input is now required
Fix french translation
add php 5.6 to travis
Merge pull request #214 from apachot/master

Update contributors list
Merge pull request #215 from enurit/patch-4

Fix french translation
Fix Coupon RemoveXPercent missing round
	modified:   core/lib/Thelia/Coupon/Type/RemoveXPercent.php
Merge pull request #216 from lovenunu/master

Fix Coupon RemoveXPercent missing round
fix "informations" typo. Fix #100
[Front office] Modifying upsell products

Display off upsell products is now based on accessory loop but not promo products
[Front office] Modifying upsell products

Display of upsell products is now based on accessory loop but not promo products