Merge pull request #1 from qbittorrent/master

update
Add feature: copy tracker URL
Copy tracker URL to the clipboard

 - code cleanup
Change icon for "Copy tracker URL"
Changed LineEdit border style to system default
Partially revert commit aeb5fa. See issue #258.
Don't touch qbtsession here.
Make the disk cache default to 128MB.
Fixes to Simplified Chinese translation
Update Portuguese translation
Optimize the addittion of huge torrents. Fixes issue #288.
Optimize the preview of huge torrents. Fixes issue #288.
Another minor optimization in qbtsession.
Merge pull request #295 from sledgehammer999/optimize_torrent_addittion

Optimize torrent addittion of huge torrents
Merge pull request #296 from sledgehammer999/minor_optimize

Another minor optimization in qbtsession.
Merge pull request #259 from sledgehammer999/revert_disk_cache

Partially revert commit aeb5fa. See issue #258.
Anonymous mode link is not opened in default browser.
Add 'Uploaded' column to main view
Fix 'Amount Uploaded' contradiction between main view and properties widget
Use qico plugin in static build. Required for RSS favicon capabilities.