Use isort

[isort](https://isort.readthedocs.io/en/latest/) sorts your Python
imports so you don't have to. This makes sure that imports are always
where they should be and prevents issues like duplicated imports and
merge conflicts. Using pre-commit, this can be done automatically
without any manual steps.

Depends on #9.

lib/api_hooks.py

@@ -1,6 +1,8 @@
 #!/usr/bin/python
 import sys
+
 import requests
+
 # sys.path.insert(1, 'lib/')
 
 

lib/display.py

@@ -2,9 +2,10 @@
 import cgi
 import sys
 
-sys.path.insert(0, '../')
 from config import Config
 
+sys.path.insert(0, '../')
+
 
 class Frontend():
     """Dynamic frontend display functions"""

lib/storage.py

@@ -1,8 +1,10 @@
 #!/usr/bin/python
-import sys
 import sqlite3
+import sys
+
 # sys.path.insert(1, '../')
 from config import Config
+
 db_pointer = Config().catalogue_db