Wiki: changes to TermVectorComponent and FieldOptionsByUseCase

[Chantal Ackermann]

Hi all,

there should have been sent some notification e-mails, but just to make
sure: I made changes to the following wiki pages. It would be great if
someone with more knowledge could just check that the changes are valid.

http://wiki.apache.org/solr/TermVectorComponent
http://wiki.apache.org/solr/FieldOptionsByUseCase
http://wiki.apache.org/solr/TermVectorComponentExampleOptions

Thanks!
Chantal