Add example notebook for full analysis

Added back in an example notebook performing all steps in a basic tld and atime aggregation analysis for a given log file. This uses the functions built in to the rc-gpfs package as opposed to writing everything out.

Also fixes some minor bugs

src/rc_gpfs/report/plotting.py

@@ -18,7 +18,7 @@ def choose_appropriate_storage_unit(size,starting_unit='B'):
     except (ValueError):
         raise(f"{starting_unit} is not a valid storage unit. Choose from 'B','kB','MB','GB', or 'TB'")
     
-    while ((size/1024) >= 1) & (exp <= 4):
+    while ((size/1024) >= 1) & (exp < 4):
         size = size/1024
         exp += 1
     return exp,units[exp]