Merge pull request #1408 from Lin-Buo-Ren/patch/improve-snap-packaging

Patch/improve snap packaging

snap/snapcraft.yaml

 name: glances
-version: '3.1.0'
+version: git
 summary: Glances an Eye on your system. A top/htop alternative.
 description: |
   Glances is a cross-platform monitoring tool which aims to present
@@ -22,17 +22,15 @@ apps:
       - network-observe
       - physical-memory-observe
       - upower-observe
-      - system-files
       - home
-
-plugs:
-  system-files:
-    read: [ /etc/glances/glances.conf ]
+    environment:
+      LANG: C.UTF-8
+      LC_ALL: C.UTF-8
 
 parts:
   glances:
     plugin: python
-    source: https://github.com/nicolargo/glances.git
+    source: .
   bottle:
     plugin: python
     source: https://github.com/bottlepy/bottle.git