Remove classes that have no references, except for freenet.tools.*

None of these classes appear to be used by:
* fred/FProxy
* any official plugin
* Sone
* Winterface
Remove unused imports.
Merge pull request #233 from bertm/cleanup-unused-classes

Cleanup unused classes
Removed OOMHandler and OOMHook, together with all usages.

The OOMHandler basically called System.gc() in response to an OOM. But the JVM
obviously will already have tried a GC before throwing the OOM in first place,
doing so again can not be expected to have much use.

Also, from the Javadocs: "An Error is a subclass of Throwable that indicates
serious problems that a reasonable application should not try to catch."
Merge pull request #208 from waldheinz/drop-oom-handler

Removed OOMHandler and OOMHook, together with all usages.
Fix NPE.
Update translations

Thanks to volunteers from Transifex. Transifex seems to return
untranslated strings even when requested not to. This is not helpful to
have committed, but until they fix it or we write something to avoid it
locally it's easier to just commit it. It will not prevent l10n from
functioning.
Update plugins

These contain translation updates.
Update default bookmark editions
Build 1463

See tag for changelog.