Added the header files for integrator serialization.

serialization/include/openmm/serialization/IntegratorProxy.h

+#ifndef OPENMM_INTEGRATOR_PROXY_H_
+#define OPENMM_INTEGRATOR_PROXY_H_
+
+#include "openmm/internal/windowsExport.h"
+#include "openmm/serialization/SerializationProxy.h"
+
+namespace OpenMM {
+
+/**
+ * This is a proxy for serializing generic Integrator objects.
+ * It makes calls to the serialize/deserialize methods in
+ * derived classes of Integrator.
+ */
+
+class OPENMM_EXPORT IntegratorProxy : public SerializationProxy {
+public:
+    IntegratorProxy();
+    virtual void serialize(const void* object, SerializationNode& node) const;
+    virtual void* deserialize(const SerializationNode& node) const;
+};
+
+} // namespace OpenMM
+
+#endif /*OPENMM_INTEGRATOR_PROXY_H_*/

serialization/include/openmm/serialization/LangevinIntegratorProxy.h

+#ifndef OPENMM_LANGEVIN_INTEGRATOR_PROXY_H_
+#define OPENMM_LANGEVIN_INTEGRATOR_PROXY_H_
+
+#include "openmm/serialization/XmlSerializer.h"
+
+namespace OpenMM {
+
+class LangevinIntegratorProxy : public SerializationProxy {
+public:
+    LangevinIntegratorProxy();
+    void serialize(const void* object, SerializationNode& node) const;
+    void* deserialize(const SerializationNode& node) const;
+};
+
+}
+
+#endif /*OPENMM_LANGEVIN_INTEGRATOR_PROXY_H_*/
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serialization/include/openmm/serialization/VerletIntegratorProxy.h

+#ifndef OPENMM_VERLET_INTEGRATOR_PROXY_H_
+#define OPENMM_VERLET_INTEGRATOR_PROXY_H_
+
+#include "openmm/serialization/XmlSerializer.h"
+
+namespace OpenMM {
+
+class VerletIntegratorProxy : public SerializationProxy {
+public:
+    VerletIntegratorProxy();
+    void serialize(const void* object, SerializationNode& node) const;
+    void* deserialize(const SerializationNode& node) const;
+};
+
+}
+
+#endif /*OPENMM_VERLET_INTEGRATOR_PROXY_H_*/
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