Enhanced JAXA PALSAR product support

[pvachon]

The attached patch provides support for JAXA PALSAR imagery, both Level 1.1 and Level 1.5 products.

The driver provides support for the following: - Level 1.1 products, single- or multi-channel, some metadata where appropriate/available. - Level 1.5 products, single- or multi-channel, some metadata describing the product, georeferencing data

This driver has been tested with the following types of products: - Level 1.1 Quad-Pol - Level 1.5 Quad-pol - Level 1.1 Single-pol (ScanSAR and Stripmap modes) - Level 1.5 Single-pol (ScanSAR and Stripmap modes)

This new driver deprecates the previous PALSAR driver. It creates a new driver called jaxapalsar, and deletes the old palsar driver.

[pvachon]

Patch to provide PALSAR support. Should apply with patch -p0 < palsar_jaxa.patch.

[warmerdam]

Nice job! Incorporated into trunk with a few minor adjustments as r12969.