Allow the same mapping to be used more than once
Throw a specific exception when a mapping is not found
Provide tests for the templating helper
Provide tests for the twig extension
Updated UPGRADE instructions
Merge pull request #355 from K-Phoen/mappings-refacto

Allow the same mapping to be used more than once [
Update UPGRADE guide for v0.12.0 to v0.13.0
Fix incorrect file extention for vich_image_type
Use the new build env on Travis

more ram, dedicated cpus, faster vm start times

all round goodness
Merge pull request #357 from joshk/patch-1

Use the new build env on Travis
Fix undefined $builder in VichImageType
Add a convention-based way to guess the filename property to use for a given mapping
Merge pull request #360 from dustin10/filename-property-guessing

Add a convention-based way to guess the filename property to use for a given mapping
Update Symfony test version to use the stable 2.6 branch instead of the dev
Add more tests for the PropertyMappingFactory
Add more tests for the UploadHandler
Provide tests for the MetadataReader
Add a test for ClassMetadata serialization
Remove useless check in YamlDriver