Started work on new world crop feature.
Added worldcrop.h header and a simple testcase.
Implemented Bounds class and made test runnable.
Comments, moved implementation of Bounds class.
Completed worldcrop.h header file.
Added dummy implementation for WorldCrop class and some simple tests.
Some more world crop tests with chunks.
Erm ... wrong region dimensions.
Implemented WorldCrop class, had to fix some invalid test data...
WorldCrop class for circular crop still needs implementation
Added a method to check whether a specific block is contained.
Added methods to world object to set rotation and world crop.
Added world cropping to world.h/cpp and region.h/cpp.
Added world cropping to the configuration file, no validation yet.
Fixed small bug with cropped worlds and rotation.
Really fixed problem with rotated and cropped worlds.
TODO fix the whole rotation mess in world.cpp region.cpp and chunk.cpp
fix(Docs): config parser looks for singular texture_dir

the config parser looks for the singular texture_dir, not the plural textures_dir as stated in the documentation.

ref: src/config/mapcrafter_config.cpp at line 116
Merge pull request #51 from Salzig/fix_texture_dir_in_docs

fix(Docs): config parser looks for singular texture_dir
Implemented is(Region|Chunk|Block)Contained methods for circular crop.
Added testcase for circular world crop.
Fixed jungle wooden planks rendering as birch planks.
Changed/commented on some rotation related positioning stuff.
Implemented world cropping in Chunk class.