Lazy loading of packages from perspectives layer
Add anaconda-mode-view-doc.

Map anaconda-mode-view-doc to <SPC> m d and move pylookup to <SPC> m D.
Update python layer documentation
Added org-repo-todo layer
highlight TODO words in python mode
Exclude fancy-narrow

Too much bug with it, it makes narrow region almost
unusable.
Remove the undo-tree cache

It breaks undo...
Add Paradox (list-packages replacement) with GPG Auth
Merge pull request #157 from CestDiego/develop

Add paradox for list-packages alternative
Add `hjkl` navigation for paradox packages list

Same strategy as with magit
Merge branch 'develop' (v0.18.0)