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Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

This makes things work even on system lacking /bin/sh, such as on
non-rooted Android systems.

Otherwise `start` will confuse the first parameter as the title of
a new command prompt if the parameter contains whitespace. That is
because the command to be run will be:

    start "abc def"

which opens a new command prompt window with the title "abc def".
With the added empty string we force the start command to interpret
the passed parameter as the file / command:

    start "" "abc def"

which will be interpreted like `""` is the title and the rest is
the file or command to start.

-------

**NOTE:** this wouldn't be necessary if the start script in msys
was defined differently; that is, if it had the empty string
already incorporated in the script (/usr/bin/start), like so:

```diff
-cmd //c start "${@//&/^&}"
+cmd //c start "" "${@//&/^&}"
```

Notice however that this would make it impossible to use start
setting a different title, so it's probably best to leave it as is.

More info: http://sourceforge.net/p/msys2/tickets/14/

-------

The change `${(z)open_cmd}` is necessary to force zsh to split the
variable by the spaces and interpret it as separate words.

More info: http://zsh.sourceforge.net/FAQ/zshfaq03.html#l17

Added an option for the msys value of $OSTYPE

There a syntax error if $cmd_var contains more than one word,
so we drop the current way to prepend nohup and use a simpler
if-else form.

Apparently `nohup` is not needed in OSX, and using it has the side
that it may break under tmux with the error

  nohup: can't detach from console: No such file or directory

For now, this commit only drops the use of `nohup` in OSX. But it
*may* not be necessary under other similar platforms.

For now this supports:
- Mac OS X
- Linux (presumably works on all versions)
- Cygwin (Windows)

Some environments (such as Android) does not have /usr/bin.

$HIST_STAMP breaks zsh_stats. see #2501

 1  1124  24.6006%    c
 2  985   21.5583%    git
 3  343   7.50711%    rails
 4  328   7.17881%    cd
 5  314   6.8724%     rspec
 6  257   5.62486%    la
 7  197   4.31167%    rake
 8  154   3.37054%    s
 9  109   2.38564%    ..
10  95    2.07923%    rvm
11  68    1.48829%    guard
12  36    0.787919%   bundle
13  29    0.634712%   ssh
14  28    0.612826%   pry
15  27    0.590939%   open
16  26    0.569052%   middleman
17  26    0.569052%   gem
18  24    0.525279%   rm
19  24    0.525279%   heroku
20  23    0.503392%   nvm

Term window title and tab title are now skinable
Tab title can be different from window title (when supported by term)
Default theme is optimized of usuability (no %u@%m: $~ in a 10 char tab)
Cleanup code duplication and add comment for supported terms
On osX it works great on iterm, and is decent once you tweak Terminal pref
Tested under GNU screen, iTerm and Apple Terminal, need to be tested on linux
TODO implement Konsole support (via dbus)

Also an alias for the function.

On my linux virtual terminals, where TERM="linux", I was getting
annoying output that was messing up my prompt.

It turns out the title function was always matching on the elif
statement for xterm/rxvt no matter what and the linux vt doesn't know
what to do with the title special control sequence and thus was printing
out garbage.

Through experimentation I figured out that the || inside of the [[ ]]
did not work:

export TERM=linux
$ if [[ $TERM =~ "^xterm" || $TERM == "rxvt" ]]; then echo $TERM; fi
linux

$ if [[ $TERM =~ "^xterm" ]] || [[ $TERM == "rxvt" ]]; then echo $TERM; fi
Signed-off-by: Brandon Philips <brandon@ifup.org>

openSUSE running zsh 4.3.10

Initial implementation of a new plugin system, so that people can managed which aliases/functions they want.

Adding a function that will open up a ticket in Lighthouse based on the number and there being a URL in a hidden file.

Moving all zsh config options into a lib/ subdirectory to make way for some upcoming changes to directory structure and configuration options