polish translations for installation steps
Adding parent class to the navigation plugin.
Added 'filesize' to File Field Type

- Renamed incorrectly named $image_data -> $file_data
- Added filesize property
Merge pull request #2732 from AnthonySterling/patch-2

Added 'filesize' to File Field Type
Merge pull request #2727 from kubens/2.2/develop

polish translations for installation steps
Adding alternator to list of allowed functions
Just a little spelling mistake
This comes in very very handy
Updated spanish translations, translated remain items
Updated module spanish translations
Merge pull request #2743 from paquitodev/2.2/develop

Updated spanish translations, translated remain items
Merge pull request #2739 from adamwathan/2.2/develop

Just a little spelling mistake
Merge pull request #2737 from chrisnharvey/patch-1

Adding alternator to list of allowed functions