Russian localization
IMAGE_SIZES now can be overridden using LFC_IMAGE_SIZES;
LFC_UPLOAD_FOLDER can be used to change "uploads" folder for uploaded images
increased slug limit from default 50 to 100
Merge remote-tracking branches 'remotes/origin/russian-localization', 'remotes/origin/slug-limit-100', 'remotes/origin/user-image-sizes' and 'remotes/origin/user-upload-folder'

Conflicts:
	lfc/settings.py