[sailfish] Show assigned labels for feeditems

Fixes #80
[sailfish] Make it optional to display labels in item list
[sailfish] Add components to the sailfish project.

Add the files in qml/ttrss/components/ to the list of other files in
the sailfish project.
License updates
[sailfish] Reworked the AboutPage

Also:
- Introduced a generic TextPage.qml to display the License and the
  Privacy Policy.
- Updated my contributor information. :)
[sailfish] Inlined the AboutItem
Fix warnings (QtCreator) and break overly long lines.
[sailfish] Refactoring: Moved "Add subscription" to function
[sailfish] Removed old MenuItems (comments)
[sailfish] VerticalScrollDecorator
[sailfish] variant is deprecated, use var instead

See http://qt-project.org/doc/qt-5/qml-variant.html
[sailfish] PushUpMenu for list of feeditems

Especially helpful for long lists.
[sailfish] unify covers code
Merge pull request #96 from michael-k/covers

[sailfish] unify covers code
[harmattan] added category selection to subscription sheet, closes #56
Merge branch 'master' of github.com:cnlpete/ttrss
updated chinese translation from transifex
- updated spanish translation
Merge branch 'labels' of git://github.com/michael-k/ttrss into michael-k-labels

Conflicts:
	i18n/harbour-ttrss-cnlpete.ts
[sailfish] fix for label being null