Rename file

Rename file `set_all_contours.f90` to `set_contours.f90`.

Inst_eddies/CMakeLists.txt

 # inst_eddies:
 add_executable(inst_eddies inst_eddies.f90 local_extrema.f90 set_max_speed.F90
-  get_1_outerm.f90 good_contour.f90 mean_speed.f90 set_all_contours.f90
+  get_1_outerm.f90 good_contour.f90 mean_speed.f90 set_contours.f90
   nearby_extr.f90 get_var.f90 config.f90 input_ssh.f90 shpc_create.f90
   write_snapshot.f90 ccw_orient.f90 write_eddy.f90 set_all_extr.f90
   complete_ssh.f90)