merge with master

.env.example

@@ -0,0 +1,4 @@
+DISCORD_TOKEN=
+PYTHONPATH=./src
+CRYPT_KEY=
+LOG_DIR=logs

requirements.txt

@@ -2,5 +2,5 @@ discord.py==1.7.0
 python-dotenv==0.15.0
 python-dateutil==2.8.1
 git+git://github.com/Klemek/miniscord.git
-numpy
-matplotlib
+matplotlib
+cryptography

src/data_types/frequency.py

@@ -2,7 +2,6 @@
 from datetime import timedelta
 import calendar
 import matplotlib.pyplot as plt
-import numpy as np
 from io import BytesIO
 import discord
 import time

src/logs/guild_logs.py

@@ -8,28 +8,29 @@
 import logging
 import asyncio
 import threading
-
+from dotenv import load_dotenv
 
 from . import ChannelLogs
 from utils import code_message, delta, deltas
 
-
-LOG_DIR = "logs"
-LOG_EXT = ".logz"
-
 current_analysis = []
 current_analysis_lock = threading.Lock()
 
-
 ALREADY_RUNNING = -100
 CANCELLED = -200
 NO_FILE = -300
 
+load_dotenv()
+
+LOG_DIR = os.getenv("LOG_DIR", "logs")
+LOG_EXT = os.getenv("LOG_DIR", ".logz")
+CRYPT_KEY = os.getenv("CRYPT_KEY", "")
+
 # 5 minutes, assume 'fast' arg
-MIN_MODIFICATION_TIME = 5 * 60
-# 30 days, remove log file
-MAX_MODIFICATION_TIME = 30 * 24 * 60 * 60
+MIN_MODIFICATION_TIME = int(os.getenv("MAX_MODIFICATION_TIME", 5 * 60))
 
+# 30 days, remove log file
+MAX_MODIFICATION_TIME = int(os.getenv("MAX_MODIFICATION_TIME", 30 * 24 * 60 * 60))
 
 class Worker:
     def __init__(