Rename and improve package-upgrade fn
Use default eshell directory
Adjust mac settings
Add mac settings for Processing
Don't throw error if auctex is not installed
Merge branch 'master' of https://github.com/ptrv/emacs.d

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.
Merge branch 'master' of https://github.com/ptrv/emacs.d