Stop replacing links inside macros

The textile-formatter runs before the macros: If a macro uses a url as a
parameter (e.g. to
{{embed_youtube(http://www.youtube.com/watch?v=bqzQ2qrtBeg)}} then these
urls where replaced with an inline link (<a href="...") - the commit
makes sure, that urls inside macros remain untouched.
removed some puts&committed the right changes for the inline-links into the textile-formatter
Merge pull request #340 from opf/feature/rails3_no_inline_links_for_macros

Stop replacing links inside macros