Made it so that update window and set window can't be open simultaneously (don't explode the set by deleting the style, say).

Made update window enforce dependencies
Added update button to welcome window (need icon still)


git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@756 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/io/package.hpp

@@ -71,6 +71,9 @@ class Package : public IntrusivePtrVirtualBase {
 	/// @pre open not called before [TODO]
 	void open(const String& package);
 	
+	/// Open a package from a zipstream that doesn't necessarily have a filename (i.e. a URL).
+	void openZipStream(wxZipInputStream* input);
+	
 	/// Saves the package, by default saves as a zip file, unless
 	/// it was already a directory
 	/** If remove_unused=true all files that were in the file and
@@ -168,6 +171,7 @@ class Package : public IntrusivePtrVirtualBase {
 	/// Filestream for reading zip files
 	wxZipInputStream*  zipStream;
 	
+	void loadZipStream();
 	void openDirectory();
 	void openSubdir(const String&);
 	void openZipfile();