Finally got precompiled headers to work.

Now all C++ files need to #include <util/prec.hpp>
 That is why all .cpp files are touched by this commit

Many changes to installers and update checking:
     - the window is now called PackagesWindow, in a new source file
     - update checking is now independent from the PackagesWindow. For update checking only a list of package versions are needed (vector<PackageDependency>). This is much less information to download at each startup.
     - the list of available packages is now a list of available Installers, since an installer can contain multiple packages.
     - moved the logic of dependency checking etc. to data/installer
     - moved the actual installation to util/io/package_manager
     - moved directory iteration/creation logic to util/file_utils
     - added PackageDirectory: the local and global package directory now have their own object (was part of PackageManager)
     - added PackageVersion: for detecting if a package has been modified after it was installed.
     - added PackageDescription: description/header of a package. Basicly the same as what Packaged provides.
     - added DownloadableInstaller: where to find an insaller, what does it contain?
     - added InstallablePackage: brining it all together: installer, package, status, action.

Current status: the insaller is currently broken in a few places, more on that soon.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@792 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/prec.hpp

@@ -35,13 +35,6 @@
 #include <set>
 using namespace std;
 
-// MSE utility headers (ones unlikely to change and used everywhere)
-#include "for_each.hpp"
-#include "string.hpp"
-#include "smart_ptr.hpp"
-#include "index_map.hpp"
-#include "locale.hpp"
-
 // ----------------------------------------------------------------------------- : Wx Aliasses
 
 // Remove some of the wxUglyness
@@ -68,11 +61,22 @@ typedef unsigned int  UInt;
 #define nullptr 0
 
 /// A string standing for a filename, has different behaviour when reading/writing
-class FileName : public String {
+class FileName : public wxString {
   public:
-	FileName()                            {}
-	FileName(const String& s) : String(s) {}
+	FileName()                                {}
+	FileName(const wxString& s) : wxString(s) {}
 };
 
+// ----------------------------------------------------------------------------- : MSE Headers
+
+// MSE utility headers (ones unlikely to change and used everywhere)
+#include "for_each.hpp"
+#include "string.hpp"
+#include "smart_ptr.hpp"
+#include "index_map.hpp"
+#include "locale.hpp"
+#include "error.hpp"
+#include "reflect.hpp"
+
 // ----------------------------------------------------------------------------- : EOF
 #endif