Log Message:
Update ruby-mechanize to version 0.7.5.  Changes from version 0.6.8
include:

+ Install as a Ruby gem.

* Fixed a bug when fetching files and not pages.
* WWW::Mechanize#get now takes hash arguments for uri parameters.
* Handling gzipped responses with no Content-Length header
* Fixed a bug with EOF errors in net/http.  [#17570]
* Handling 0 length gzipped responses. [#17471]
* Changed parser to lazily parse links
* Lazily parsing document
* Updating UTF-8 support for urls
* Adding AREA tags to the links list.
* WWW::Mechanize#follow_meta_refresh will allow you to automatically follow
  meta refresh tags. [#10032]
* Adding x-gzip to accepted content-encoding.
* Added Digest Authentication support.
* Many bug fixes.