Adds numRssEntries option to limit rss feed size.
Fixes deprecation warning, reduces compilation verbosity.

The reduced verbosity helps notice potential problems for the compiler.
Merge pull request #28 from gradha/pr_limit_rss_size

Adds numRssEntries option to limit rss feed size.
Merge pull request #29 from gradha/pr_silences_warnings

Fixes deprecation warning, reduces compilation verbosity.