* DOCUMENTATION: Moved installation instructions to separate page
* Added Fedora to contents table
* Added Issue/Bug Report section to README
* Some minor improvements
* DOCUMENTATION: Rename directory doc to docs
* Also move ISSUE_TEMPLATE.md to docs directory
* DOCUMENTATION: Use current repo's files
* This makes it consistent instead of having few local and few pointing to
espressif/arduino-esp32 by all linking to local files
* DOCUMENTATION: Fix hyperlink to issue/bug template in contents
* DOCUMENTATION: contents: supress platform specific installation instruction
