Update issue templates

.github/ISSUE_TEMPLATE/success-story.md

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+---
+name: Success story
+about: Describe successful use of the photobooth application
+
+---
+
+**Describe your photobooth**
+For what type of event have you been using the application? What does your photooboth look like?
+
+**Hardware (please complete the following information):**
+ - Device [e.g. Intel Laptop, Raspberry Pi 3B+, Odroid C2]
+ - Camera [e.g. Canon EOS 500D]
+ - GPIO: [Yes/No]
+
+**Software (please complete the following information):**
+ - OS [e.g. Raspbian Stretch]
+ - Python version [e.g. 3.5.1]
+
+**Modifications:**
+ - List changes...
+ - ...or added features
+
+**Problems:**
+ - A list of problems...
+ - ...that you experienced during the use
+
+**Pictures**
+If you like, add pictures of your photobooth, include screenshots etc.