Rewrite and add frame geometry related functions.

Rewrite and add frame geometry related functions.

* src/frame.c (Fframe_position): New function.
(Fset_frame_position): Rename parameters and rewrite doc-string.
(syms_of_frame): Remove Qframe_position, Qframe_outer_size,
Qtitle_height and Qframe_inner_size.  Add Qouter_edges,
Qouter_position, Qouter_size, Qnative_edges, Qinner_edges,
Qtitle_bar_size.
* src/nsfns.m (frame_geometry): New function.
(Fx_frame_geometry): Call frame_geometry.
(Fx_frame_edges): New function.
* src/w32fns.c (C_CHILDREN_TITLEBAR, TITLEBAR_INFO)
(GetTitleBarInfo_Proc): Define these so we can use the
GetTitleBarInfo API.
(Fw32_frame_menu_bar_size, Fw32_frame_rect): Remove.
(Fx_frame_geometry): Rewrite.
(Fx_frame_edges, Fx_mouse_absolute_pixel_position)
(Fx_set_mouse_absolute_pixel_position): New functions.
* src/xfns.c (frame_geometry): New function.
(Fx_frame_geometry): Call frame_geometry.
(Fx_frame_edges, Fx_mouse_absolute_pixel_position)
(Fx_set_mouse_absolute_pixel_position): New functions.