1.15: Iconfont a11y fix (yellowled)

1.14: Consistence changes

1.13: try/catch Exception to not break the flow

1.12:

    * Exclude content having code highlighter or multilingual tags. Do not use
      parsable Smarty Variables in combination with any other content having
      braces "{}"!
    * Extend Requirement to Smarty 3.1 and Serendipity 1.7+
    * Removed old code parts for backward compat (was erroneous)
    * Rename wrong $serendipity['PLUGINDATA'] to $serendipity['plugindata']

1.11: More compatibility fixes fc19cfc

1.10: Added: configs comment warning and their default to not parse comments

1.9: Latest: Smarty3 forward compatibility