treat hyphens equal to whitespace during query time

treat hyphens equal to whitespace during query time. Fix for bug #1
Added extra requesthandlers: terms and moreLikeThis. Very simple, but with high impact on making a search engine "advanced".

Added requesthandlers: Terms (Vector) Component to show term
frequencies per document, improved automated suggestions "suggest"
handler, moreLikeThis.
change ranking model to BM25/Okapi.

change ranking model to BM25/Okapi. It works better than the default
Vector Space Model
removed my initials from the comments
Added termVectors="true" for MLT and possible use of term (vector) component

This extension makes sure the index can cope later with term
frequencies for use in the term vector component and moreLikeThis
handlers.
Fix for hyphen-issue

Added extra filter during query time: WordDelimiterFilterFactory.
Apparently, the behavior when parsing the query is not what we expect.
Applying this filter fixes it.
changed the schema

I forgot to add the Okapi ranking model in a previous commit, and I
slight changed the settings for the filter added to the text_general
field type.
Merge pull request #3 from juntezhang/master

Merge more hyphenation-related fixes.