Search api range

http://drupal.org/sandbox/alex-ter/1286062

Unlike the existing module -- http://drupal.org/project/search_api_ranges , this doesn't add a slider, but a pre-configured list of ranges, e.g.:

Year
    1960 - 1970 (16)
    1970 - 1980 (12)

From the README:

For creating a ranged facet you will first need to create a regular facet.

 - Configuring the range arguments.

After creating the facet you will have to insert arguments for the range to 
work correctly, for that you have 2 options. A simple and an advanced one.
to apply the range to the facet you will have configure the block the facet is
displayed in, you will find it in structure/blocks.

You will notice 2 options, the simple range and the advanced range.

 - Simple range

The first option will create ranged facets using a fixed value.
For example inserting "10" will create facets of 0 - 10, 10 - 20 , 20 - 30 etc..

 - Advanced range
 
The second option will create ranged facets using a pre-defiend list of values
And filters. Each row of the list will represent a facet.

 - Supported filters:
   regular braces "(num1 num2)" - the left one is equal to "Greater then num1"
   and the right one is qeaul to "Less then num2".
   For example (100 200) will produce a range between 101 and 199.
   
   square braces "[num1 num2]" - the left one is equal to "Greater or equal
   to num1" and the right one is equal to "Less or equal to num2".
   For example [100 200] will produce a range between 100 and 200.
   
   the "*" sign - you can replace a number with "*" to produce a "num1 and 
   above" facet or "up to num1" facet.
   For example [100 *] will produce a range of "100 and above", while [* 100] 
   will produce a "up to 100" range.
   
   you can combine any of the filters to create a desited range.
   For example [100 168) will produce a range between 100 and 167.
   
IMPORTANT for the ranges to work correctly you must NOT insert a Total number 
of terms, and it must always be left blank or 0.