Another round of effects bashing.

I've added some of the new plugin stuff to LV2, Nyquist, and
Vamp so that they play better in the new system.  They no
longer get bunched in with the Audacity effects when sorting
or grouping the menus.  They have not been fully converted
but they should be good for 2.1.0.

Nyquist plugins now include ";author" and ";copyright"
statements.

Added the 4 new Nyquist plugins to the Windows build.

Audiounits are still coming...had to push them to the back
burner to get this other stuff out of the way.

Scanning for new plugins has been improved so that newly
discovered ones will be shown to the user when Audacity starts.

Effects menu sorting has been fixed and improved.

Disabling effect types in Preferences works again and you
no longer have to restart Audacity for them the change to work.

Effect usage in chains works again.

Plugin registration dialog code simplified a bit.

Group names in the pluginregistry are now base64 encoded.  I
never really thought about it, but wxFileConfig group names
are case insensitive and since I was using the group name as
the plugin ID, I ran into a conflict on Linux where there
were two plugins with the same name, just different case.  (And
they were different plugins.)  Hoping all of this will change
when/if the config file gets converted to XML.  (wx3 if finally
including XML support)

A fair amount of cleanup of this new code has been done and
will continue as more stuff is converted.

src/PluginManager.h

@@ -25,7 +25,7 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 //
-// PluginManager
+// PluginDescriptor
 //
 ///////////////////////////////////////////////////////////////////////////////
 
@@ -53,6 +53,7 @@ public:
    void SetPluginType(PluginType type);
 
    // All plugins
+
    const wxString & GetID() const;
    const wxString & GetPath() const;
    const wxString & GetName() const;
@@ -60,7 +61,6 @@ public:
    const wxString & GetVendor() const;
    const wxString & GetDescription() const;
    const wxString & GetProviderID() const;
-   const wxString & GetDateTime() const;
    bool IsEnabled() const;
 
    void SetID(const PluginID & ID);
@@ -70,7 +70,6 @@ public:
    void SetVendor(const wxString & vendor);
    void SetDescription(const wxString & description);
    void SetProviderID(const PluginID & providerID);
-   void SetDateTime(const wxString & dateTime);
    void SetEnabled(bool enable);
 
    wxString GetMenuName() const;
@@ -118,7 +117,6 @@ private:
    wxString mVendor;
    wxString mDescription;
    wxString mProviderID;
-   wxString mDateTime;
    bool mEnabled;
 
    // Effects
@@ -138,10 +136,21 @@ private:
    wxArrayString mImporterExtensions;
 };
 
+///////////////////////////////////////////////////////////////////////////////
+//
+// PluginManager
+//
+///////////////////////////////////////////////////////////////////////////////
+
+WX_DECLARE_STRING_HASH_MAP(wxArrayString, ArrayStringMap);
+
 //WX_DECLARE_STRING_HASH_MAP(PluginDescriptor, PluginMap);
 typedef std::map<PluginID, PluginDescriptor> PluginMap;
+
 typedef wxArrayString PluginIDList;
 
+class PluginRegistrationDialog;
+
 class PluginManager : public PluginManagerInterface
 {
 public:
@@ -213,15 +222,9 @@ public:
    const PluginDescriptor *GetFirstPlugin(PluginType type);
    const PluginDescriptor *GetNextPlugin(PluginType type);
 
-   const PluginDescriptor *GetFirstPluginForProvider(const PluginID & ID);
-   const PluginDescriptor *GetNextPluginForProvider(const PluginID & ID);
-
    const PluginDescriptor *GetFirstPluginForEffectType(EffectType type);
    const PluginDescriptor *GetNextPluginForEffectType(EffectType type);
 
-   const PluginDescriptor *GetFirstPluginForEffectFamily(const PluginID & ID);
-   const PluginDescriptor *GetNextPluginForEffectFamily(const PluginID & ID);
-
    bool IsRegistered(const PluginID & ID);
    void RegisterPlugin(const wxString & type, const wxString & path);
 
@@ -235,19 +238,17 @@ public:
    // 
    const PluginID & RegisterLegacyEffectPlugin(EffectIdentInterface *effect);
 
-   void CheckForUpdates();
-
 private:
    bool Load();
    void LoadGroup(const wxChar *group, PluginType type);
    void Save();
    void SaveGroup(const wxChar *group, PluginType type);
 
-   void RemoveMissing();
+   void CheckForUpdates(bool forceRescan);
+   void DisableMissing();
    wxArrayString IsNewOrUpdated(const wxArrayString & paths);
 
    PluginDescriptor & CreatePlugin(IdentInterface *ident, PluginType type);
-   wxString GetDateTime(const wxString & path);
 
    bool GetSubgroups(const wxString & group, wxArrayString & subgroups);
 
@@ -269,7 +270,12 @@ private:
    wxString SharedKey(const PluginID & ID, const wxString & group, const wxString & key);
    wxString PrivateGroup(const PluginID & ID, const wxString & group);
    wxString PrivateKey(const PluginID & ID, const wxString & group, const wxString & key);
+
+   // The PluginID must be kept unique.  Since the wxFileConfig class does not preserve
+   // case, we use base64 encoding.
    wxString ConvertID(const PluginID & ID);
+   wxString b64encode(const void *in, int len);
+   int b64decode(wxString in, void *out);
 
 private:
    static PluginManager mInstance;
@@ -283,6 +289,8 @@ private:
 
    PluginMap mPlugins;
    PluginMap::iterator mPluginsIter;
+
+   friend class PluginRegistrationDialog;
 };
 
 #endif /* __AUDACITY_PLUGINMANAGER_H__ */