Further repository setup

[chrisroadmap]

• issue request template
• pull request template
• conda-forge
  • sort out conda versioning issue (stray "v" prepended; currently you have to conda install climateforcing==v0.2.1 rather than conda install climateforcing==0.2.1)
• continous integration for deployment
  • codecov upload
  • pypi
  • conda

[znicholls]

@chrisroadmap I don't know if it's worth the effort now but you could also put this on the conda-forge channel if you wanted...

[chrisroadmap]

Yeah that's one for the to-do. I stuck it on my own channel as I'm using this on a system where you can only conda-install - so was a short-term fix.