Add support for NewsBlur

Quirks:

* NewsBlur doesn't include the title when querying a single feed, so we cache
  it locally
* Credentials are stored via cookies. Cookies are stored in curl handles which
  are recreated for every request. The user has to specify a "cookie-cache".
Merge pull request #102 from t-8ch/newsblur2

Add support for NewsBlur
actually use oldreader-min-items (fixes #104).
empty items for search dummy feed before filling it with search results (fixes #101).
make sure view gets configuration before commands are executed with -x commandline option (fixes #91).
JSON-C needs to be 0.11 or higher due to dependency on json_object_iter_* http://upstream-tracker.org/compat_reports/json-c/0.10.20120530_to_0.11.20130402/abi_compat_report.html. URL has also changed
Merge pull request #105 from skn/upstream

JSON-C needs to be 0.11 or higher due to dependency on json_object_iter_*
check for json-c 0.11.
add unit test for issue 94.
port parser frame files to newer coco/r version; regenerate (fixes issue #94).
make date format localizable.
extract strings, merge, fix fuzzy translations in de.po.
update changelog.
update documentation.
Merge branch 'master' of git://github.com/akrennmair/newsbeuter

* 'master' of git://github.com/akrennmair/newsbeuter:
  update documentation.
  update changelog.
  extract strings, merge, fix fuzzy translations in de.po.
  make date format localizable.
  port parser frame files to newer coco/r version; regenerate (fixes issue #94).
  add unit test for issue 94.
  check for json-c 0.11.
  JSON-C needs to be 0.11 or higher due to dependency on json_object_iter_* http://upstream-tracker.org/compat_reports/json-c/0.10.20120530_to_0.11.20130402/abi_compat_report.html. URL has also changed
  make sure view gets configuration before commands are executed with -x commandline option (fixes #91).
  empty items for search dummy feed before filling it with search results (fixes #101).
  actually use oldreader-min-items (fixes #104).
  Add support for NewsBlur