Make /tags/ page responsive, fix some paddings

In post cards, the "tag and date" text was slightly moved to the right and looked ugly. This was fixed.
The /tags/ page had a horizontal padding of 0 which made it look ugly. Solved.
The /tags/ page now scales based on screen size and is responsive. Fixes #5

package.json

@@ -1,7 +1,7 @@
 {
     "name": "mindtheme",
     "description": "Mind Overflow's official website style",
-    "version": "0.0.10",
+    "version": "0.0.11",
     "engines": {
         "ghost-api": "v3"
     },