Port Combine operation from geotools

[mbedward]

Original author: [email protected] (June 15, 2011 11:53:05)

We should extract the combine operation from geotools and port it over since it is a pure JAI operation.

Original issue: http://code.google.com/p/jaitools/issues/detail?id=39

[mbedward]

From [email protected] on June 15, 2011 11:53:06 First cut is in

[mbedward]

From [email protected] on June 15, 2011 11:53:07 We need to add an SPI hook class

[mbedward]

From [email protected] on June 15, 2011 11:53:08 Renamed Combine class to CombineOpImage. Moved the array resizing methods to a utility class in jaitools.numeric. Need to add some unit tests.