Update .gitignore for celery
Update .gitignore for celery

Added celeryev.pid to .gitignore

UUDigitalHumanitieslab/texcavator,msassmann/texcavator,msassmann/texcavator,UUDigitalHumanitieslab/texcavator,msassmann/texcavator,UUDigitalHumanitieslab/texcavator,msassmann/texcavator