Merge tag '2.1.5' into dev

2.1.5
Update README.md

Future features sorted
BUGFIX: Fixing all problems with undefined variables
BUGFIX: removing intrusive CSS property
Opens the URL in the new tab if it starts with http:// https:// ftp://

Firebug leftover removed
Merge branch 'tigerxy-patch-2' into feature/pull_requests
Merge branch 'glukasik-master' into feature/pull_requests
Merge branch 'glukasik-patch-URLs' into feature/pull_requests
Merge branch 'feature/pull_requests' into dev
change version
Merge branch 'release/2.1.6'