Remove Setting context menu entry

- Detect Cinnamon version and remove on Cinnamon >= 2.0.0
- Fixed #22
Added some features to feed file.

    * Added "edit feed file" context menu entry which launces gedit with the feed file
    * Added comment support for feed file: lines starting with '#' will be ignored
    * Added custom title support: The user can specify a custom title for each feed to be displayed instead of the RSS title:
        <feed_url> <custom_title>
Fixed problems with feed file as reported by wizard974

    * Filename can now contain spaces
    * Custom titles can now contain spaces
    * Applet tooltip now contains custom titles instead of RSS titles
Merge branch 'master' of https://github.com/jonbrett/cinnamon-feeds-applet into feed_file

Conflicts:
	applet.js

Also replaced gedit by xdg-open.
Merge branch 'master' of https://github.com/jonbrett/cinnamon-feeds-applet

Conflicts:
	applet.js
Added some features to feed file.

    * Added "edit feed file" context menu entry which launces gedit with the feed file
    * Added comment support for feed file: lines starting with '#' will be ignored
    * Added custom title support: The user can specify a custom title for each feed to be displayed instead of the RSS title:
        <feed_url> <custom_title>
Fixed problems with feed file as reported by wizard974

    * Filename can now contain spaces
    * Custom titles can now contain spaces
    * Applet tooltip now contains custom titles instead of RSS titles
Merge branch 'feed_file' of github.com:NiklasMM/cinnamon-feeds-applet into feed_file

Conflicts:
	applet.js
Merge pull request #29 from NiklasMM/feed_file

New feed_file features: Custom title, comments and edit from context menu