Fixed typo in "Job successfully installed" success message
Removed duplicate variable assign
remove DateHelper

DateHelper is no longer necessary here as it is called in the getCollectionDatePublic() already.
Merge pull request #1273 from bluefuton/job-installed-typo

Fixed typo in "Job successfully installed" success message
Merge pull request #1319 from ojalehto/refactor/date-helper/duplicate-variable-assign

Removed duplicate variable assign
Merge pull request #1326 from patrickheck/patch-13

remove DateHelper
added jpeg to mime helper
pulled jpeg from mime helper - realized approach to this helper will have to change because of duplicate keys to array