Enhancements to "Browse Indexes" admin panel provided by Ron Van den Branden (rvdb) - thanks, Ron!:  - Adds handling for range indexes of type xs:double, xs:float, xs:boolean, xs:dateTime, and xs:date.  previously it only handled xs:string and xs:integer.   - Also, fixes a bug that caused an error when viewing index-keys on attribute nodes with path-based range indexes.  
Enhancements to "Browse Indexes" admin panel provided by Ron Van den Branden (rvdb) - thanks, Ron!: 
- Adds handling for range indexes of type xs:double, xs:float, xs:boolean, xs:dateTime, and xs:date.  previously it only handled xs:string and xs:integer.  
- Also, fixes a bug that caused an error when viewing index-keys on attribute nodes with path-based range indexes.  

Remaining known issues: 
1. No index keys are found on certain nodes in the /db/xmlad collection's @expansion node (Lucene QName) and @id node (NGram QName) when showing index keys by QName, even though the correct number appears when showing index keys by Node.  Common thread: showing index keys on attributes by QName.  
2. Need to complete reporting of default/other Lucene analyzers.
3. Need feedback on other missing datatypes besides the ones this commit adds?

svn path=/trunk/eXist/; revision=13810

adamretter/exist,zwobit/exist,eXist-db/exist,wshager/exist,zwobit/exist,lcahlander/exist,patczar/exist,adamretter/exist,opax/exist,jensopetersen/exist,ambs/exist,ljo/exist,MjAbuz/exist,patczar/exist,ambs/exist,eXist-db/exist,ljo/exist,hungerburg/exist,wolfgangmm/exist,jessealama/exist,joewiz/exist,olvidalo/exist,patczar/exist,dizzzz/exist,windauer/exist,ljo/exist,patczar/exist,windauer/exist,wshager/exist,opax/exist,dizzzz/exist,MjAbuz/exist,adamretter/exist,hungerburg/exist,joewiz/exist,olvidalo/exist,jessealama/exist,patczar/exist,jessealama/exist,kohsah/exist,lcahlander/exist,kohsah/exist,jensopetersen/exist,dizzzz/exist,ambs/exist,joewiz/exist,adamretter/exist,MjAbuz/exist,shabanovd/exist,wshager/exist,lcahlander/exist,ambs/exist,shabanovd/exist,joewiz/exist,shabanovd/exist,wshager/exist,joewiz/exist,shabanovd/exist,eXist-db/exist,ljo/exist,jessealama/exist,windauer/exist,ambs/exist,joewiz/exist,ambs/exist,wolfgangmm/exist,patczar/exist,dizzzz/exist,RemiKoutcherawy/exist,olvidalo/exist,hungerburg/exist,wshager/exist,kohsah/exist,jensopetersen/exist,windauer/exist,wolfgangmm/exist,adamretter/exist,wshager/exist,lcahlander/exist,jessealama/exist,shabanovd/exist,kohsah/exist,zwobit/exist,shabanovd/exist,dizzzz/exist,wolfgangmm/exist,RemiKoutcherawy/exist,lcahlander/exist,wolfgangmm/exist,opax/exist,MjAbuz/exist,eXist-db/exist,wolfgangmm/exist,jensopetersen/exist,opax/exist,zwobit/exist,zwobit/exist,eXist-db/exist,RemiKoutcherawy/exist,MjAbuz/exist,zwobit/exist,MjAbuz/exist,olvidalo/exist,jessealama/exist,adamretter/exist,hungerburg/exist,RemiKoutcherawy/exist,kohsah/exist,ljo/exist,hungerburg/exist,RemiKoutcherawy/exist,jensopetersen/exist,olvidalo/exist,eXist-db/exist,windauer/exist,ljo/exist,opax/exist,windauer/exist,jensopetersen/exist,RemiKoutcherawy/exist,kohsah/exist,lcahlander/exist,dizzzz/exist