merge branch 'hotfixes'

Merge branch 'dev'

# By Alex Forsythe (3) and Scott Dyer (1)
* dev:
  Updates CHANGELOG
  Adds reverse of RRT and RDT splines. Slight tweaks to RDT coefficients modifying shadow reproduction.
  patch to resolve streaks that occur in some images
  Adds dw ratio preserving odt tone curve code.  Replaces conditional statements designed to clip data to some minimum value with max function for avoidance of underflows.  Closes ampas#16

Merge branch 'dev'

# By Alex Forsythe (10) and others
# Via Alex Forsythe
* dev: (24 commits)
  Minor update to aces-dev/README.rst
  Update images/README
  Fix potential bug in RDT by relocating the clip 0 to 1 function to after the 48/52.37 scaling
  Fix Rec.709 ODT EOTF to correspond to recommendation in Appendix 1 of ITU-R BT.1886.
  Add regenerated V3 transforms (no semantic difference from prior transforms)
  Add regenerated V2 transforms (no semantic difference from prior transforms)
  Update idt_maker_script.csh to generate v2 and v3 trees; this time don't imply that v3 LogC is CCT-dependent. Update v2_IDT_maker.py and v3_IDT_maker.py to make them more robust in the face of mixed-case arguments, and update their version numbers. Update README to reflect lack of channel gain file, etc.
  Remove alexa_balance.txt, since the channel gains don't matter in IDTs (neither in raw nor in LogC IDTs). Clear out v2 and v3 transform directories; we are going to replenish them but with a new structure.
  Added images directory with README containing a link to FTP server where reference footage can be found.
  Added CHANGELOG Update ctlrender makefile to install rrt and utilities.
  Added CTL transforms.
  Updated apps/ctlrender/README.rst to reflect IIF to ACES name change.
  Updated License Language and README.rst
  Corrected a typo in the symbolic link to CtlManual.pdf.
  Updated README files to .rst format for better preview in github.com
  Added clip, min, and max functions to utilities.ctl.
  renamed directory
  Updated path in symbolic link to CtlManual.pdf
  Updated cltrender readme
  ctlrender cleanup
  ...