edfu: simplify Uebersetzung Partial highlighting
allow setting hl.fragsize via TypoScript
edfu: use huge fragsize

otherwise we have problems if the string is split inside a < ... > group and our escaping will break things

#85
set default value for hl.fragsize to 100

just like the Solr default
support setting Solr query timeout

defaults to 5s, just like Solarium
edfu: allow 10s Solr timeout
germania-sacra: use 15s Solr timeout and re-enable person name highlighting
improve error handling
fix Solarium class names (preceding \)