moved GitHub-specific documents into .github and split issue template

CONTRIBUTING.md → .github/CONTRIBUTING.md

@@ -154,7 +154,7 @@ into the upstream repository is the same.
  * [General GitHub documentation][gh-help]
  * [GitHub pull request documentation][gh-help-pr]
 
-[cs-conf]:       .php_cs.dist
+[cs-conf]:       ../.php_cs.dist
 [cs]:            http://cs.sensiolabs.org/
 [gh-help]:       https://help.github.com
 [gh-help-pr]:    https://help.github.com/send-pull-requests
@@ -167,7 +167,7 @@ into the upstream repository is the same.
 [rst-info]:      http://symfony.com/doc/current/contributing/documentation/format.html#restructuredtext
 [rst-make]:      https://github.com/liip/LiipImagineBundle/wiki/Building-RST-Documentation
 [php-unit]:      http://phpunit.de/
-[composer-file]: composer.json
+[composer-file]: ../composer.json
 [composer]:      https://getcomposer.org/
 [composer-dl]:   https://getcomposer.org/download/
 [coc-14]:        https://www.contributor-covenant.org/version/1/4/code-of-conduct.html

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+<!--- Provide a general summary of the issue in the Title above -->
+
+### Preconditions
+<!--- Provide a more detailed information of environment you use -->
+<!--- Bundle version, tag, HEAD, etc., PHP & GD version, etc.. -->
+1. 
+2. 
+
+### Steps to reproduce
+<!--- Provide a set of unambiguous steps to reproduce this bug include code, if relevant  -->
+1. 
+2. 
+3. 
+
+### Expected result
+<!--- Tell us what should happen -->
+1. 
+
+### Actual result
+<!--- Tell us what happens instead -->
+1. [Screenshot, logs]

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -0,0 +1,17 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+**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.

README.md

@@ -53,7 +53,7 @@ filter.
 
 ### Contributor Code of Conduct
 
-This project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md).
+This project is released with a [Contributor Code of Conduct](.github/CODE_OF_CONDUCT.md).
 By participating in this project you agree to abide by its terms.
 
 ### Attribution