in order for newline characters to be parsed correctly

rationale: if a user's directory isn't writeable, then autojump is
probably his last concern :)

Leaking vars into the user's zsh env is not good, esp. when the var
refs a directory -- zsh may then interpret it as a named directory
ref and use it in prompts, for e.g.

Autojump is really starting to mature :)

When starting jumpapplet without an earlier config file, it raises an UnboundLocalError

tparker@shostakovich:[~/data/src/autojump] ./jumpapplet
loading settings
no config file
Traceback (most recent call last):
  File "./jumpapplet", line 93, in popup
    paths=load_paths(maxpath=defaults["maxpath"])
  File "./jumpapplet", line 54, in load_paths
    path_dict=path_dict.items()
UnboundLocalError: local variable 'path_dict' referenced before assignment

This patch fixes that

Signed-off-by: Pierre Gueth <georges.wbushjr@laposte.net>

Signed-off-by: Joel Schaerer <joelthelion@laposte.net>

When starting jumpapplet without an earlier config file, it raises an UnboundLocalError

tparker@shostakovich:[~/data/src/autojump] ./jumpapplet
loading settings
no config file
Traceback (most recent call last):
  File "./jumpapplet", line 93, in popup
    paths=load_paths(maxpath=defaults["maxpath"])
  File "./jumpapplet", line 54, in load_paths
    path_dict=path_dict.items()
UnboundLocalError: local variable 'path_dict' referenced before assignment

This patch fixes that

Signed-off-by: Pierre Gueth <georges.wbushjr@laposte.net>

Signed-off-by: Joel Schaerer <joelthelion@laposte.net>

Now uses preexec_functions to execute autojump's preexec.
This prevents clobbering of preexec in case its already set.

Signed-off-by: Joel Schaerer <joelthelion@laposte.net>

for the original implementation
(http://n2.nabble.com/Preserving-COMMAND_PROMPT-td2507773.html)

This reverts commit 0136d8f138.