Move creationg of icons_dir to main
Types: image, image_png
Mapnik: use type image or image_png for property 'image'
repeat-image: basic support, including repeat-image-offset
Merge branch 'master' into icon_png
Stat: move cache to class; fun to clear cache
Global Data: init with None; clear stat cache after update
Eval: debug(), bugfix
Eval: switch(), re-write possible_values
Types 'image', 'image_png': get dimensions of images, save to global_data
repeat-image: support repeat-image-align
Eval: new internal function _global_data()
Support Mapnik 2.3; remove repeat-image-offset from Mapnik 2.2
repeat-image: add repeat-image-align to @depend_property
Update docu the reflect that we support Mapnik 2.3 now
(repeat-)image: Update docu that mapnik 2.x about SVG->PNG conversion
Types icon/image/image_png: check if value is set before opening file
Prop fill-image: specify image type, so that conversion SVG->PNG happens
Merge pull request #47 from plepe/icon_png

Improve line images, support (JOSM) repeat-image-*