* 2.7:
[Yaml] fix exception contexts
People - person singularization
[Yaml] properly handle unindented collections
[Serializer] Add test for ignored attributes during denormalization
chomp newlines only at the end of YAML documents
Fixed server status command when port has been omitted
Update UPGRADE FROM 2.x to 3.0
Catch \Throwable
Use levenshtein level for better Bundle matching
[WebProfilerBundle] Fix CORS ajax security issues