digikam: Version bump to 4.4.0, Bugfixes and adjustements needed for libkexiv2 4.14.2

This update fixes the following issues with digikam:

- Added patch to fix builds with KDE 4.14.x

- Update to 4.4.0
digikam:
- General : Navigate between pictures using PageUp/PageDown is now
possible while editing properties through captions/tags
sidebar.
- General : New keyboard shortcuts to improve usability while photo
review (as to switch focus on text edit widget, or to
toogle tags view).
- General : New keyboard shortcut to switch on/off color managed
view for thumbnails and preview.
- AlbumGUI : Album preview can be displayed in tooltip.
- SlideShow : Labels and Tags keyboard shortcuts can be used while
slideshow.
- SlideShow : Support multi-monitors computer.
- 50 fixed bugs

kipi-plugins:
- PiwigoExport : Allow to upload videos (OGG, MP4 and WEBM) if the Piwigo
server accept them.
- PiwigoExport : Remove the support of old Piwigo API.
- 1 fixed bug (kde#337943)

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