[translation ar] Fixed some typos
updated translation
updated translation
[translation ar] fixed missing percent sing in download manager window
Update ar.ts
Merge pull request #1048 from forabi/master

[translation ar] New strings translated, typos fixed...
Added plural forms for hours/mins/secs in download manager and tr() for data units
Merge pull request #1049 from forabi/master

[translation] Added plural forms for hours/mins/secs in download manager and tr() for data units
Coding style in downloaditem.cpp
Enhanced plural forms for languages with complex rules
Updated translations
Added application/x-mimearchive into qupzilla.desktop

Latest QtWebKit can open mhtml archives.
See #820
Added option to copy download link in download options dialog.

Closes #1056
Serbian translations update
X11: Use different WM_CLASS for private browsing window
AdBlockRule: Add new rule type Invalid for invalid rules
AdBlockManager: Match always by lower case strings
AdBlock: Use fast search tree for basic rules

For all rules that can be matched with simple string-contains match,
use fast tree searching.
Only in EasyList, there is 6000 those rules.
It improves overall performance of AdBlock matching by 5 - 10 times,
at the cost of memory.
The tree needs about 1.5MB memory for 1000 rules, which is a great
tradeoff for such big performance improvement.
Typo s/childs/children
AdBlockSubscription: Don't allocate search tree on heap.