Correct scale for slides with 512 tiles.  Also fix for closed polyline paste bug.
Merge branch '512-bug'

* 512-bug:
  Correct scale for slides with 512 tiles.  Also fix for closed polyline paste bug.
Clean trailing whitespace
Use micro symbol (Greek mu) rather than "u" to represent microns
Merge branch 'micro_symbol'

* micro_symbol:
  Use micro symbol (Greek mu) rather than "u" to represent microns
  Clean trailing whitespace
Split APIv2 into separate files
Adding openslide as a submodule
Include build instructions for openslide

and python bindings in the requirements
Getting started with openslide reader
Fix for shell=false in linux and refactor for base reader
Getting openslide working with openjpeg2
Bugfix from virtual machine while creating session
Upload ptif files
Refactor uploader code into individual files
Making uploader refactor work
fixing up openslide reader'
Reading image data from OpenslideReader
Pyramid uploader runnign with openslide, not ready
Option to re-upload an image

- option --overwrite
- removes the image from the image store (both image record and collection)
Going from thread to multiprocess