Large-image

Features
- Initial implementation of multi-source tile source ([764](../../pull/764))
- Added pixelmap annotation element ([767](../../pull/767), [776](../../pull/776))

Improvements
- Add more opacity support for image overlays ([761](../../pull/761))
- Make annotation schema more uniform ([763](../../pull/763))
- Improve TileSource class repr ([765](../../pull/765))
- Improve frame slider response with base quads ([771](../../pull/771))
- Default to nearest-neighbor scaling in lossless image conversion ([772](../../pull/772))
- Improve the import time ([775](../../pull/775), [777](../../pull/777))

Bug Fixes
- The tile iterator could return excess tiles with overlap ([773](../../pull/773))

Features
- Added image annotation element ([742](../../pull/742), [750](../../pull/750))
- Allow the discrete scheme to be used on all tile sources ([755](../../pull/755))

Improvements
- Expand user paths ([746](../../pull/746))
- Work with more matplotlib palettes ([760](../../pull/760))

Changes
- Use importlib rather than pkg_resources internally ([747](../../pull/747), [778](../../pull/778))

Bug Fixes
- Fix expanding a style palette with a single named color ([754](../../pull/754))

Features
- Better palette support in styles ([724](../../pull/724))
- Enumerate available palettes ([741](../../pull/741))

Improvements
- The openjpeg girder source handles uploaded files better ([721](../../pull/721))
- Suppress some warnings on Girder and on bioformats ([727](../../pull/727))

Bug Fixes
- Harden detecting file-not-found ([726](../../pull/726))
- Fix the pylibmc dependency for windows ([725](../../pull/725))

Changes
- Reduce extraneous files in large_image distribution ([718](../../pull/718))

Changes
- Improve library dependencies in setup.py ([710](../../pull/710), [715](../../pull/715))

Changes
- Include the converter in the girder tasks dependency ([707](../../pull/707))