update usage and new config file (#181)

Author: MIWdlB

docs/source/notebooks/test_config.json

@@ -5,6 +5,7 @@
   "xc_functional":"b3lyp",
   "projector":"mu",
   "localization":"spade",
+  "virtual_localization":"cl",
   "convergence":1e-6,
   "charge":0,
   "spin":0,
@@ -13,7 +14,6 @@
   "mu_level_shift":1000000.0,
   "run_ccsd_emb":true,
   "run_fci_emb":true,
-  "run_virtual_localization":true,
   "run_dft_in_dft":true,
   "n_mo_overwrite":[null,null],
   "max_ram_memory":4000,