* Mono.Mozilla.dll.sources,

* Mono.Mozilla.dll.sources,
  Mono.Mozilla/DOM/Navigation.cs,
  Mono.Mozilla/interfaces/nsIHistoryEntry.cs,
  Mono.Mozilla/interfaces/nsIInputStream.cs,
  Mono.Mozilla/interfaces/nsISHistory.cs,
  Mono.Mozilla/interfaces/nsISHistoryListener.cs,
  Mono.Mozilla/interfaces/nsISimpleEnumerator.cs,
  Mono.Mozilla/interfaces/nsIURI.cs,
  Mono.Mozilla/interfaces/nsIWebNavigation.cs,
  Mono.WebBrowser/DOM/INavigation.cs:

Add nsIWebNavigation interface and related
dependencies to access navigation-related properties directly (CanGoBack, etc).
Add INavigation interface and implementation to expose navigation properties.
Navigation is now done through this interface (Reload(), Stop(), etc).

Please note: Due to threading issues on linux (namely, mozilla being run
on a different thread), only methods that do not affect drawing can be
invoked through the interfaces, so although Reload is now called from
the INavigation interface, it is still being routed through the Base
class and the glue code (and not through the nsIWebNavigation.Reload
call, as are other non-drawing-affecting methods like GetTitle).

* Mono.Mozilla/ICallback.cs, Callback.cs: Remove unneeded events, adjust parameters,
add support enumeration for tracking loading state.

* Mono.Mozilla/DOM/DOMHTMLDocument.cs, Mono.WebBrowser/DOM/IDOMHTMLDocument.cs:
Add URL getter.

* Mono.WebBrowser/IWebBrowser.cs, Mono.Mozilla/WebBrowser.cs:
Add Navigation interface getter.
Add Navigated event support through the StateChange and LocationChange
events.
Clean up cached objects when navigating.
Remove Reload, Forward, Stop, Home methods, these are now accessible
through the INavigation interface.

* Mono.Mozilla/Base.cs: Add call to return the navigation interface.
Add MarshalAs so that returning interfaces directly works on mono.

2007-11-08 Andreia Gaita <avidigal@novell.com>

svn path=/trunk/mcs/; revision=89207