Release Name: 0.5

Notes:
Usability enhancements.


Changes:
* mailto: and javascript: hrefs are now handled via the exclude option
* rewrite absolute URLs sans host correctly
* strip href and image src tags in order to prevent parser errors
* some scaffolding for mechanize
* global proxy option (currently only used for mechanize)
* use -nolist for lynx
* catch errors in Websitary::App#execute_downdiff
* :rss_find_enclosure => LAMBDA: Extract the enclosure URL from the item 
  description
* :rss_format_local_copy => STRING|BLOCK/2: Format the display of the 
  local copy.