release 0.4.2

[vovasty]

* implemented ability to download torrent data
if rtorrent and n2hell are running on different machines, n2hell
will copy torrent data to local machine
if user works with n2hell by using address which is not local (not
127.0.0.1 or localhost), user can download zipped torrent content or
torrent itself, if it contains only one file
if user works with n2hell locally and rtorrent is running locally,
user can open torrent directly in explorer in windows or finder under
macosx
* search now highlights patterns in results
* delete and set directory dialogs now show selected torrents
* torrent info now shows in popup (you can click on torrent name or
state icon in view to invoke popup)
* logging to file disabled by default
* small fixes

Happy New Year and Season's Greetings!