Some adjustments
Updating to common code

Conflicts:
	EXECUTE/driver.txt
	OUTPUT/output_trees.txt
	SOURCE/H9.f90
	SOURCE/control.mod
	SOURCE/write_outputs.f90
Added flag to write_outputs

I added a flag to the driver file to make sure the individual tree
output file is not always created. I will change this to include a
netcdf option, when I find time.
Resolve conflicts

Conflicts:
	EXECUTE/driver.txt
	OUTPUT/output_trees.txt
	SOURCE/H9.f90
	SOURCE/control.mod
	SOURCE/write_outputs.f90

These conflicts of my and your commits should be resolved.
cleaning-up some mistake in write_output

I had forgotten to make the first write command to file 22 conditional
upon the flag.
Merge branch 'master' of https://github.com/adfriend45/H9

Conflicts:
	SOURCE/H9.f90
	SOURCE/constants.mod
	SOURCE/control.f90
	SOURCE/control.mod
	SOURCE/tree.mod
	SOURCE/write_outputs.f90