.osx: Disable smart quotes and dashes
.aliases: Add `reload`

`reload` invokes the shell as a login shell, which essentially reloads it.

Closes #247.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  .aliases: Add `reload`
  .osx: Disable smart quotes and dashes
.aliases: Update RubyGems before updating installed gems

Closes #282.
Fix Command+Enter for sending mails in Mail.app
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  .aliases: Update RubyGems before updating installed gems