[ADD] attachment_preview
[FIX] typo
[FIX] cope with empty ids
[FIX] get original-title attribute
[IMP] better filter for when to show preview button
[RFR] move functions to module scope
[ADD] allow to preview binary fields in tree views
[FIX] support old firefoxes not implementing window.location.origin
[FIX] remove old magic's charset detection
[RFR] allow to get any binary field's extension
[ADD] support old CentOS' magic module
[FIX] handle empty binary fields correctly
[FIX] allow previewing arbitrary binary fields
[ADD] allow previewing binary fields on forms
[FIX] error on list views without binary fields
[FIX] pass filename to column
[FIX] js != py
Merge pull request #16 from hbrunn/7.0-attachment_preview

[ADD] attachment_preview