Support numeric fields

[fxp]

Currently all Lucene field are index as text.

This can cause problem with numeric fields and range queries like scale denominator.

Eg.

<And>
  <PropertyIsGreaterThanOrEqualTo>
    <PropertyName>Denominator</PropertyName>
    <Literal>5000</Literal>
  </PropertyIsGreaterThanOrEqualTo>
  <PropertyIsLessThanOrEqualTo>
    <PropertyName>Denominator</PropertyName>
    <Literal>50000</Literal>
  </PropertyIsLessThanOrEqualTo>
</And>

Sort order is alphabetic so wrong results may occur.

Suggestion :

• Add configuration for numeric fields in config-lucene.xml

  <numeric>
    <Field name="denominator" type="INT"/>
  </numeric> 
  

• Update RangeQuery by NumericRangeQuery in LuceneQueryBuilder for numeric fields.

TODO : check if it could be better for dates

Info :

• RangeQuery/NumericRangeQuery comparison  http://invertedindex.blogspot.com/2009/11/numeric-range-queries-comparison.html
• ML discussion  http://osgeo-org.1803224.n2.nabble.com/Lucene-Index-numerique-au-lieu-d-alphabetique-td5708979.html

[fxp]

Add support for numeric field (configuration for denominator, west, east, south, north parameters). Removed all 360+1 for spatial search using Lucene. Removed token attribute from index-fields.xsl in order to avoid a different tokenized fields configuration.

[fxp]

r6854

See #388 for date range queries.