Vupysolr

- prevent decoding non-MARC data

- fix method in SolrStatusParser

- add generic class Parser
- add parser classes SolrConfigParser, SolrSchemaParser, SolrStatusParser
- parse return values of VuFindIndex methods config, schema and status
- add methods to VuFindMarcParser

- add method to VuFindMarcParser

- add methods to VuFindParser

- add methods to VuFindParser