add --allBands options to gdal_calc.py (#5388)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26954 f0d54148-0727-0410-94bb-9a71ac55c965
add test for gdal_calc.py (#5388)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26955 f0d54148-0727-0410-94bb-9a71ac55c965
update gdal_calc.py docs and add gdal_calc.dox for online documentation (#5388)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26956 f0d54148-0727-0410-94bb-9a71ac55c965
Ili: Write SURFACE tag for Area

git-svn-id: https://svn.osgeo.org/gdal/trunk@26957 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage