add render node
add render tree
add tempfile
simplify gdal usage
left the usage of context pool for render node subclasses
add metatile render node;hillshading and colorrelief
add mapnik, storage, im render node; clean up gdal code
add render node factory
add gdaltools test
remove old renderer test
add render cache; simplify render node; update tests
add MasonConfig, MasonRenderer and Tests
add RenderNodeFactory and Tests
Update test config file
Merge branch 'develop' of github.com:Kotaimen/mason into
feature/config-refactor

Conflicts:
	mason/utils/__init__.py
	tilerenderer.py
fix mode name;fix composer order
fix test errors
fix improperiate naming
fix another inproperiate naming
update default mode and remove reload option
imagemagick command now use {{name}} to reference source images
update workq