Update issue templates (#782)

A lot of issues do not have screenshots and which glyphs are the problem has to be asked and or guessed.

Also change to newer github issue template method.

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,3 +1,12 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
 #### 🗹 Requirements
 
 <!-- ⚠️ !!!
@@ -13,16 +22,27 @@ it's a general question please go to the gitter chat instead: https://gitter.im/
 - [ ] I have searched the [FAQ](https://github.com/ryanoasis/nerd-fonts/wiki/FAQ-and-Troubleshooting) for help
 - [ ] I have searched the [Wiki](https://github.com/ryanoasis/vim-devicons/wiki) for help
 
+
 #### 🎯 Subject of the issue
 
+Experienced behavior:
 <!--- Describe issue here -->
 
+Expected behavior:
+<!--- Please do not forget to explain what you would have expected to see -->
+
+Example symbols:
+<!--- The codepoint of one or more affected symbols, or paste the text containing the issue here (no screenshot) -->
+
 #### 🔧 Your Setup
 
 - _Which font are you using (e.g. `Anonymice Powerline Nerd Font Complete.ttf`)?_
+   - _Please give the full filename_
+   - _Where did you get the file from (download link, self patched, source downloaded from link...)_
 - _Which terminal emulator are you using (e.g. `iterm2`, `urxvt`, `gnome`, `konsole`)?_
 - _Are you using OS X, Linux or Windows? And which specific version or distribution?_
 
 #### ★ Screenshots (Optional)
 
-<!--- Provide screenshots where appropriate -->
+<!--- Provide screenshots where appropriate, they help tremendously -->
+<!--- Try to include the title of terminal windows and possibly settings dialogues -->

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,35 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Requirements**
+
+<!-- ⚠️ !!!
+If you are unsure what you are reporting is an issue or
+it's a general question please go to the gitter chat instead: https://gitter.im/ryanoasis/nerd-fonts
+⚠️ !!! -->
+
+
+<!-- ⚠️ !!! Issues not filled out with the template will be closed straight away and will only be responded to once filled properly ⚠️ !!! -->
+<!--- By posting an issue you acknowledge the following: -->
+
+- [ ] I have searched the [issues](https://github.com/ryanoasis/nerd-fonts/issues) for my request and found nothing related and/or helpful
+- [ ] I have searched the [FAQ](https://github.com/ryanoasis/nerd-fonts/wiki/FAQ-and-Troubleshooting) for help
+- [ ] I have searched the [Wiki](https://github.com/ryanoasis/vim-devicons/wiki) for help
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.