Don't overwrite silently on symlink conflicts

Symlink conflicts are now handled in similar fashion as normal
file-conflicts.

lib/homesick/actions/file_actions.rb

@@ -68,8 +68,10 @@ module Homesick
                      "#{destination} exists and points to #{destination.readlink}",
                      :red
 
+          if collision_accepted?(destination, source)
             FileUtils.rm destination
             FileUtils.ln_s source, destination, force: true unless options[:pretend]
+          end
         when :conflict
           say_status :conflict, "#{destination} exists", :red