add method to retrieve categories for customer
add individual css file to contain styles that should overwrite
framework styles
category test
add previewmode switch to container to have low quality pictures resized
in order to speed up preview generation
use constants defined in config instead of class constants for REST API
access
add previewmode member to GfxContainer
cleanup
make file check a bit more robust (case insensitive, additionally accept
"jpeg"), fix a typo
add "global" config file that should include ALL other config files
add timer class used for internal tests and profiling
cleanup