Caltha 0.1

Version 0.1

First release on GitHub for the new Caltha tool.
Any changes mentioned below were applied to the main python script after it was
isolated from the old "galaxy-tools-umi-isolation" repository. This python
script is now a package on PyPI and will be maintained in this repository.

• Created PyPI package for Caltha.
• Added documentation page to repository (still needs to be filled).
• Zip archives are now created
  by Caltha (used to be created by a BASH script).
• Temporary working directories are now managed by Caltha (used to be managed
  by a BASH script).
• Wrongly assigned reads bug was
  fixed (PR by https://github.com/dickgroenenberg).
• Renamed galaxy-tools-umi-isolation python tool to Caltha.
• Isolated galaxy-tools-umi-isolation python script to dedicated repository.