Added option to set default zoom in pages (in preferences: Browsing ->
Web Configuration -> Default zoom on pages:)
Also fixed one spelling mistake (thank to J. Hooverman)
Updated chinese translation file (zh_CN.ts)
Finally added support to manage search engines. You can add search
engines from sites that supports opensearch standard, but you can also
add them manually.
There is also possibility to specify shortcuts for quickly searching in
location bar on your favourite engines.
