PIM-3129: Remove mimetype check during file import.
PIM-3129: Prevent to import files that contains non UTF8 characters
PIM-3129: Fix random CS
Merge pull request #1543 from akeneo/PIM-3129

PIM-3129: Prevent to import files that contains non UTF8 characters
PIM-2556: Fix date problem on export profile
PIM-2556: Changed phpspecs
PIM-2556: Updated changelog