Minor changes, link about how to take a screenshot

I haven't found a good page yet about taking screencasts

Author: nicolas-raoul

PULL_REQUEST_TEMPLATE.md

@@ -1,9 +1,9 @@
 ## Description
 
-Fixes #{Issue Number}
+Fixes #{GitHub issue number}
 
-Describe the changes made and why they were made.
+{Describe the changes made and why they were made.}
 
-## For user interface changes: Screenshots showing what changed
+## Screenshots showing what changed
 
-
+{Only for user interface changes, otherwise remove this section. See [how to take a screenshot](https://android.stackexchange.com/questions/1759/how-to-take-a-screenshot-with-an-android-device)}