Pull version info from module level definition (#83)

mosdef_cassandra/writers/inp_functions.py

@@ -2,10 +2,12 @@
 import datetime
 import numpy as np
 import unyt as u
+import mosdef_cassandra
 
-import mosdef_cassandra.utils.convert_box as convert_box
 
 from unyt import dimensions
+
+import mosdef_cassandra.utils.convert_box as convert_box
 from mosdef_cassandra.utils.units import validate_unit, validate_unit_list
 
 
@@ -61,13 +63,12 @@ def generate_input(
     # Check/convert kwargs units
     _check_kwarg_units(kwargs)
     _convert_kwarg_units(kwargs)
-
     # Construct an input file section by section
-
     inp_data = """
-! Generated by mosdef_cassandra version 0.2.1 on {}
+! Generated by mosdef_cassandra version {} on {}
 """.format(
-        datetime.datetime.now()
+        mosdef_cassandra.__version__,
+        datetime.datetime.now(),
     )
 
     # Extract some basic info