imported textures have ioinfo, docs improvements
avoid copy on importing (and save ioinfo)
rough work on pathlib, untested!
Merge pull request #379 from jabooth/textureio

imported textures have ioinfo, docs improvements
working recursive globbing
add pathlib to setup.py
Merge remote-tracking branch 'upstream/master' into pathlib
BUG fixed: block element not reset if norm=0
Adds support for odd patch shapes in function extract_local_patches_fast
add pathlib to travis build
Adds simple tests for different patch shapes
Merge pull request #384 from jalabort/odd_shape_patches

Adds support for odd patch shapes in function extract_local_patches_fast
Merge remote-tracking branch 'upstream/master' into pathlib
Merge pull request #381 from jabooth/pathlib

Recursive globbing
Adds labels for ibug eye annotations
Merge pull request #382 from dubzzz/hog_bug

BUG fixed: block element not reset if norm=0
Merge pull request #386 from jalabort/eye_labels

Adds labels for the ibug eye annotation scheme
adds ibug_tongue
adds einstein tongue image
small fix