Add composer replace section
Add branch alias
tweak the composer setup for travis
Correct memory_limit settings
Merge pull request #1534 from abimus/feature/composer-replace

Create composer replace section
[CoreBundle] Remove old class reference

Fix #1548.
Merge pull request #1562 from stloyd/patch-1

[CoreBundle] Remove old class reference
Refactored sequence generator to be more flexible

Conflicts:
	src/Sylius/Bundle/OrderBundle/Resources/config/driver/doctrine/orm.xml

Conflicts:
	src/Sylius/Bundle/SequenceBundle/Doctrine/ORM/NumberListener.php
Extend previous changes for sequences code to replace Coupon generator with new code
Refactor code a bit more after feedback, add missing changes into specs