Get rid of user API key - simplifying setup process

Signed-off-by: Peter Legierski <peter@legierski.net>
Merge branch 'feature-user-api-key'
Updating send() - should send data to first user if no user specified
If auto recognition enabled, it should check for cookie with user's name

Signed-off-by: Peter Legierski <peter@legierski.net>
Merge branch 'feature-default-user'
Resurrect path_to_cert variable
it's pointing to bundled cacert.pem file by default, but can be updated if needed

Signed-off-by: Peter Legierski <peter@legierski.net>
Bump version to 1.6.0

Signed-off-by: Peter Legierski <peter@legierski.net>
Merge branch 'hotfix-cert-path'