changes needed for EDL import to work again.

- add sequence.update(data=False) function.
- made some sequence vars editable.
- correct some comments.

also rename rna function sequence.getStripElem() --> strip_elem_from_frame()

source/blender/python/intern/bpy_interface.c

@@ -818,7 +818,7 @@ typedef struct {
 } dealloc_obj;
 
 /* call once __file__ is set */
-void bpy_module_delay_init(PyObject *bpy_proxy)
+static void bpy_module_delay_init(PyObject *bpy_proxy)
 {
 	const int argc = 1;
 	const char *argv[2];
@@ -856,6 +856,9 @@ static void dealloc_obj_dealloc(PyObject *self)
 	dealloc_obj_Type.tp_free(self);
 }
 
+PyMODINIT_FUNC
+PyInit_bpy(void);
+
 PyMODINIT_FUNC
 PyInit_bpy(void)
 {