Support for latin1-special characters and euro-sign with standard fonts

When using a PDF standard font, the encoding is set to WinAnsiEncoding.
In addition, a encoding function is used to translate from UTF-8 to WinAnsiEncoding (table taken from jsPDF).

This gives access to e.g. the EUR-sign and to some of the latin1-based special characters (e.g. German umlaute).

It also addresses issue #137.