Added .datepicker class

I added a class to the selector. In one view may be more than one datepicker.
fix for #2422. Change the dataProcessor.toDataFormat function which is sensible to the editor enterMode, causing this issue.
Add sizes attribute to favicon
Add alt and description attribute to the image field.
Complete German translation for image field.
Merge pull request #2448 from anatolbroder/2.2/translation

German translation
Replacing is_a with instanceof.

is_a was deprecated in PHP 5, 5.1, and 5.2. Then it was undeprecated. We can use instanceof achieve the same thing. So here we are.

Fixes #2446.
Merge pull request #2445 from anatolbroder/feature/favicon

Add sizes attribute to favicon
Fixing Some Blog Items

- Wrong variable call in blog view
- Wrong blog lang variable in the spanish language.
- Random code formatting.

Fixes #2444
Merge branch '2.2/develop' of github.com:pyrocms/pyrocms into 2.2/develop
2.2/develop - blog module : french translations & corrections
Update "Records per page" translation

"Records per page" instructions should not only say on the admin
section.
Issue #2430
2.2/develop - blog module : french translations & corrections
Merge pull request #2455 from khalil-tabbal/2.2/develop

2.2/develop - blog module : french translations & corrections
Merge pull request #2454 from tristanjahier/2.2/develop

Update "Records per page" translation
Fixing swedish lang files for search module.

This appears to just be the keyword field type swedish lang file.
Make "Search" a Lang Variable

Placeholder was previously hardcoded.

Fixes #2449.
Merge pull request #2447 from anatolbroder/feature/field.image

Add alt and description attribute to the image field.
Fixing search lang call.

Turns out this only works in certains plans. Safer with the PHP call.
Adding custom cancel URI for field_form streams CP function.

This was in the docblocks but nothing was in the code to handle it. Pass it in the $extra array.

Fixes #2443