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
Fixed gitignore and credits in readme
Merge pull request #128 from kocsismate90/fix-docs

Fixed gitignore and credits in readme
version 9.7.1

fix credits
Optimized images
Merge pull request #129 from gergo85/master

Optimized images
version 9.7.1

images compression
Added support for returning relative URL-s
Renamed config option to return_relative_url
Fixed include.min.js
Fixed to return URLs relative to the source folder
fix thumb limit creation problem
Configuration option became a GET parameter
Updated changelog
Fixed returning relative URL-s from subdirs
Merge pull request #130 from kocsismate90/relative_url

Support for returning relative URL-s
Merge branch 'master' of https://github.com/trippo/ResponsiveFilemanager