Beginnings of the PackageKit dependency solver

Not functional (or tested) yet. The libsolv setup for a somewhat
simplified installation case should be more or less complete, though.
The solution conversion to to-be-created Haiku data structures and the
handling of problems is still missing, though.

headers/os/package/solver/Solver.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _PACKAGE__SOLVER_H_
+#define _PACKAGE__SOLVER_H_
+
+
+#include <SupportDefs.h>
+
+
+namespace BPackageKit {
+
+
+class BSolverPackageSpecifierList;
+class BSolverRepository;
+
+
+class BSolver {
+public:
+								BSolver();
+								~BSolver();
+
+			status_t			Init();
+
+			status_t			AddRepository(BSolverRepository* repository);
+
+			status_t			Install(
+									const BSolverPackageSpecifierList&
+										packages);
+
+private:
+			class Implementation;
+
+private:
+			Implementation*		fImplementation;
+};
+
+
+}	// namespace BPackageKit
+
+
+#endif // _PACKAGE__SOLVER_H_