Merge branch '5-create-example-for-parsing-nemo-namelists' into 'develop'

Resolve "Create example for parsing nemo namelists"

Closes #5

See merge request !7

examples/context.py

+"""Context for examples."""
+
+import os
+import sys
+sys.path.insert(
+    0,
+    os.path.abspath(
+        os.path.join(os.path.dirname(__file__), '..')
+    )
+)
+
+import namelist

examples/parse_NEMO_namelists_to_JSON.py

+from context import namelist
+import json
+
+in_file_ref = "namelist_ref"
+in_file_cfg = "namelist_cfg"
+
+with open(in_file_ref) as f:
+    ref_nmls = namelist.parse_namelist_file(f)
+
+with open(in_file_cfg) as f:
+    cfg_nmls = namelist.parse_namelist_file(f)
+
+nmls = ref_nmls.copy()
+
+for k in cfg_nmls:
+    if k in nmls:
+        nmls[k].update(cfg_nmls[k])
+    else:
+        nmls[k] = cfg_nmls[k]
+
+print(json.dumps(nmls, indent=4))