Append the erratun number when doing a request to add an nvr to errata
Add more params to 'add to errata' and add cronjob_mode

Params added to 'add to errata': tag, erratum

tag is really 'target_tag' in the tasks view.

Cronjob Mode is used to intentify which modes from the cronjob are available for
each distro.
Merge pull request #143 from thescouser89/cronjob_modes

Cronjob modes
Initialize variable first
Re-add tag param to endpoint
Merge pull request #144 from thescouser89/cronjob_modes

Cronjob modes
Add errata field to package

If the errata field is specified for a package, this will be sent to the mead
scheduler when adding to errata or when scheduling a build; it will override the
current settings we have for errata.
Fix version check in ETT

Since the mead field is being deprecated, call the correct method to get the
mead nvr instead.
Merge pull request #145 from thescouser89/cronjob_modes

Cronjob modes
Another fix for deprecation of the mead field
Merge pull request #146 from thescouser89/cronjob_modes

Another fix for deprecation of the mead field
Fixing strings text
Merge pull request #147 from thescouser89/cronjob_modes

Fixing strings text