Cleanup layout's HTML
Improved error messages and unit tests in BaseGroupedMapper, fixed CS

Fixed tests for php 5.3
Merge pull request #2412 from dunglas/patch-3

Cleanup layout's HTML
Merge pull request #2411 from pulzarraider/base_group_mapper_impr

Improved error messages and unit tests in BaseGroupedMapper, fixed CS
add catalan & spanish no javascript warning message translation
Merge pull request #2418 from davidromani/master

add catalan & spanish no javascript warning message translation
add catalan & spanish no fields available message translation
Merge pull request #2420 from davidromani/master

add catalan & spanish no fields available message translation
Update SonataAdminBundle.pl.xliff
Merge pull request #2427 from axzx/patch-3

Update SonataAdminBundle.pl.xliff
avoid long lines

It is a coding style violation.
log exceptions

Don't just throw away the useful error messages!
also log previous exception message when available