HOT FIX RELEASE

- Use HTTPS instead of HTTP for ORG ELPA repository (thanks to aaronjensen)
- Fix =helm= display function (thanks to jackkamm)
- Fix =anaconda-mode= variable names in Python layer (thanks to nixmaniack)
- Fix typo in =helm-cscope-find-calling-this-function= (thanks to dubnde)
- Use =org=mime= package from MELPA (thanks to jackkamm)
- Replace broken =helm-spotify= package by =helm-spotify-plus= (thanks to leezu)
- Update =Quelpa= library
- Backport up to date list of themes in core and themes-megapack layer.
- Fix =pyim= package name in Chinese layer (thanks to James Wang)