Added "Auto bibshow" option

If enabled, automatically inserts [bibshow] (with default settings) when an unexpected [bibcite] is encountered.
Fixed typo in $papercite->process() output for [bibcite] error
Added "Auto bibshow" option

If enabled, automatically inserts [bibshow] (with default settings) when an unexpected [bibcite] is encountered.
Added "skip for post lists" option

Allows the user to skip papercite processing on pages where multiple
posts or pages are shown. In this case, papercite tags are stripped and
ignored.
UTF8.php library for missing mb_ function
Merge branch 'master' of https://github.com/schreifels/papercite into autobibshow
Removed <p> tag for options