Release version 1.3.

Features:
  - Let PASSWORD_STORE_DIR override the password store directory location
  - Use GNU getopt to allow arguments to be anywhere
  - Confirm before overwriting on insert (use --force to revert behavior)
  - Use GNU readline when reading passwords in the default insert mode
  - Skip directories and add edit mode to ZSH completion file
  - Make GPG output quieter
  - Support ramdisk on OSX via out-of-tree patch
  - Add --version switch

Bug fixes:
  - Don't quote $EDITOR, so that folks can specify arguments to their editor
  - Be careful about cleaning up temporary files -- use signal handler to ensure it happens
  - Make more efficient use of bash's read command for prompting
  - Split out common gpg options into unified variable
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