Climatological Run: Read trajectories from files instead of calling TRAJ

ATTENTION: high disk space requirements !!!

MESSy-run without JUBE

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 previously 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

MESSy-run with JUBE-Script

Run with TRAJ, create trajectory files

copy JUBE-Script to working directory workdir
in workdir/xmessy_jube_clim.xml:
- change comment:
  - <comment>messy/clams clim-run, create traj files</comment>
- in parameterset "clamstraj_nml":
```
timestep_trajout=6
loutput_traj=.true.
timestep_trajin=0
```
- in parameterset "timer_nml":
```
delta_time = 1800
```
- in parameterset "channel_nml":
```
out_prec_netcdf = 2
```
jube run xmessy_jube_clim.xml
cp workdir/messy_bench/000000/000003_exe/work/climtest*_clamstraj.nc trajsave_dir

Use previously created trajectory files

in workdir/xmessy_jube_clim.xml:
- change comment:
  - <comment>messy/clams clim-run, use traj files</comment>
- in parameterset "clamstraj_nml":
```
loutput_traj=.false.
timestep_trajin=6
dir_trajin="trajsave_dir"
```
jube run xmessy_jube_clim.xml