Disabling hgshelve extension
Merge branch 'master' of gh-neiljdo:neiljdo/dotfiles

* 'master' of gh-neiljdo:neiljdo/dotfiles:
  anaconda plugin updates
  - Updated ANACOND_ADDITIONAL_PATHS - anaconda plugin update
  Updates to anaconda plugin-related env variables
  - Updated oh-my-zsh submodule url - oh-my-zsh updates - .zshrc updates