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Substitutes the current duplicate logic for the standard
and cross-platform function open_command in plugins:

  frontend-search, jira, node, web-search

Refactor the functions and group listings to have fewer functions,
but have them take group names as parameters.
Pull group definitions in to a single associative array.

virtualenvwrapper: treat git repos as project roots again (instead of requiring a .venv customization directory)
Change error output to more conventional OMZ format, so it's clear the plugin is for oh-my-zsh and not base zsh.
Use `local` variables instead of manual unsetting.

see
https://github.com/robbyrussell/oh-my-zsh/pull/2790#issuecomment-112716330

Current `ggpush` is `git push origin` instead of `git push origin $(current_branch)`
Same for `ggpull`

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>

Previously, spaces in the path would result in wto separate errouneous
paths being parsed. This fixes that issue.

This reverts commit 1493d88e, made
to put a deprecated notice on rails3 and rails4 plugins, so that
users would migrate to the unified rails plugin.

It's been 1.5 years since that, so everyone should be migrated to
the good one.

gaa was brought back by popular demand — see #3535
gap was replaced with gapa — see #3682
gdc was replaced with gdca — see #3977

  The command 'which' launches an external process that isn't
  really necessary.

also allow multiple arguments for ggp and ggl aliases

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>

Some minor changes to the aliases.
* removed php artisan dump-autoload since is no longer a command in laravel 5
* updated the la5routes alias to the new version of the command
* added a la5vendor alias to publish assets from vendor packages