Update to newsbeuter 2.6, with some minor bugfixes.
Remove "smart" detection of ncurses, and don't try to call curses_version() if unavailable

Upstream changelog:

2.6 (2013-03-19):
	Fixed crash in RSS parser (thanks to Isaac Good).
	Fixed authentication issues with Google Reader (thanks to Fabrice Noilhan).
	Fixed bug in Google authentication (Daniel Aleksandersen).
	Style table headers in bold (Daniel Aleksandersen).
	Add support for q and aside tags (Daniel Aleksandersen).
	Remove all soft-hyphens (Daniel Aleksandersen).
	More compact default user-agent on Mac OS X (Daniel Aleksandersen).
	Add Norwegian bokmål translation (Daniel Aleksandersen).
	Updated Russian translation (Justin Forest).
	Updated Polish translation (Michal Siemek).

2.5 (2012-01-06):
	Implemented download-full-page configuration option.
	Added configuration option to use external URL viewer (fixes issue #242).
	Added ability to store Google Reader password in an external file (fixes issue #239).
	Added Tiny Tiny RSS support (fixes issue #243).
	Made HTTP authentication method configurable (fixes issue #247).
	Implemented "delete-read-articles-on-quit" option.
	Fixed rendering of nested <ol> lists.