Clarify patch process
deprecate assortmentsBundle usage
remove assortmentsBundle from the bundles list

see #116
The copy right was not up to date...
Merge pull request #121 from aRn0D/copyright

The copy right was not up to date...
Merge pull request #116 from docteurklein/patch-2

deprecate assortmentsBundle usage
Merge pull request #117 from docteurklein/patch-3

remove assortmentsBundle from the bundles list
Merge pull request #115 from docteurklein/patch-1

Clarify patch process
Fixed reference to depracated SyliusSalesBundle
Merge pull request #122 from elliot/master

Fixed reference to depracated SyliusSalesBundle
Update custom_calculators.rst

Update service declaration
Merge pull request #124 from shadypierre/patch-1

Update custom_calculators.rst