Added FAQ (#1556)

* Added FAQ

* moved FAQ to website

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -5,6 +5,8 @@ about: Create a report to help us improve
 ---
 
 <!--
+First read the FAQ: https://flameshot.org/faq/
+
 If you don't know how to get some of the following information from your
 computer, visit:
 https://flameshot.org/issue-reporting/

.github/ISSUE_TEMPLATE/question.md

@@ -1,4 +1,6 @@
 <!--
 Write the question you have. Try to explain it in details if possible. Feel free to include screenshots, pictures, GIFs, and Videos. Also remember to search your question in the issues page as you might find the answer to your question faster that way.
 You can also checkout the Flameshot website: https://flameshot.org/
+
+Please also read the FAQ: https://flameshot.org/faq/
 -->

README.md

@@ -443,6 +443,9 @@ When `make` command completed you can launch flameshot from `project_folder/buil
 Simply use `make install` with privileges. 
 Note: If you install from source, there is no uninstaller, you will need to manually remove the files. Consider using [CMAKE_INSTALL_PREFIX](https://cmake.org/cmake/help/latest/variable/CMAKE_INSTALL_PREFIX.html) to install to a custom location for easy removal. 
 
+### FAQ
+https://flameshot.org/faq/
+
 ## License
 - The main code is licensed under [GPLv3](LICENSE)
 - The logo of Flameshot is licensed under [Free Art License v1.3](img/app/flameshotLogoLicense.txt)