Climatological Run: Read trajectories from files instead of calling TRAJ

Run with TRAJ, create trajectory files

timer.nml:
```
  delta_time=1800
```

clamstraj.nml:

  timestep_trajout=6,
  loutput_traj=.true.,
  timestep_trajin=0,

channel.nml

  OUT_PREC = 1, 2, 2, 1, 1, 1   ! for trajectory output 
  OUT_CHANNEL(51) = 'clamstraj',   2, 2,  1, T,F, T,F,F,F,F, F,F, , ,

=> output precision: nf90_double
=> one step per output-file

run messy-script
save trajectory files !

Use previous created trajectory files

create new working directory !
use the same messy-script and namelist-directory
Changes in namelist clamstraj.nml:
```
  loutput_traj=.false.,
  timestep_trajin=6,
  dir_trajin='...',
```
- if trajectory files are read in, no trajectory files are written out
  => loutput_traj=.false. ! The trajectories must be read in immediately before calling one of the other submodels
  => timestep_trajin must be divisor of all submodel timesteps
  - (timestep_chem, timestep_mix, timstep_bmix, timestep_cirrus)
Change working directory in messy-script
run messy-script