switch tld level to 1.1

The dasein.tld file references the http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd schema file, but on examining the TLD file you will see that the contents are still for 1.1. For example, the TLD 1.x version has a <tlibversion> tag, while version 2.x has a <tlib-version> tag. Having the wrong schema level identified can cause deployment issues in app servers that validate the schema.