Implement graftM create --no-tree, tested by test_create.py/test_create_no_tree
Also implemented _taxit_create_no_tree in create.py to generate a refpkg from taxit without a tree.
Also includes conda environment file for testing. All the tests pass in this environment except three diamond tests (test_diamond.py/test_blastp and test_basename, and test_graft.py/test_diamond_translate).
Implement graftM create --no-tree, tested by test_create.py/test_create_no_tree Also implemented _taxit_create_no_tree in create.py to generate a refpkg from taxit without a tree.
Also includes conda environment file for testing. All the tests pass in this environment except three diamond tests (test_diamond.py/test_blastp and test_basename, and test_graft.py/test_diamond_translate).