Fixed 0003548: Support RSS for news syndication.

M news_inc.php

• Factored some common code into this include file. Didn't put it in API since they are mainly news specific print code.

A news.php

• A page that displays one news item. The RSS links points to this page with the appropriate news id.

A news_rss.php

• Page to generate RSS v2 files.

M main_page.php

• Used refactored code from news_inc.php
• Added a link to the news_rss.php page.

M core/news_api.php

• Some formatting
• news_get_limited_rows(): Gets the news rows that should be displayed in one page as per configuration.
• news_get_field(): Get the field with the specified name for the specified news entry.
• news_is_private(): Checks if the specified news is private or public.

M lang/strings_english.txt

• Added "RSS"

A core/class.RSSBuilder.inc.php

• RSSBuilder class by Michael Wimmer.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2336 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9