astrochem.c have not been merged, next time i will use rebase.
Merge branch 'data-structures' into mpi

Conflicts:
	src/astrochem.c
	src/astrochem.h
	src/solve.c
	tests/solve_test.c
Merge branch 'data-structures' into mpi
Merge branch 'mpi' into mpi_rebase

Conflicts:
	src/astrochem.h
	src/solve.c