Added modes for image resizing

+ Added $image_max_mode, $image_resizing_mode which controll the options
when resizing crop,exact etc.
+ Added override switch for image resizing (more in config)
+ Cleaned up config and upload scripts (added some comments too)
Please USE TABS instead 4 spaces!

- removed the 'default' access keys for security reasons
Added changelog for 9.7.1
Formating
Merge pull request #127 from Mikeyhun/master

Image resizing modes added