Add pip3 completion support to pip plugin
Add pip2 and pip-2.7 support to pip plugin
Add missing quotes to within-bundler-project function
Add missing `command` wrapper for git

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>
git_prompt_info: ignore git-config errors

Merged from #2906

The function `git_prompt_info` calls `git config` for its stdout output,
but doesn't handle the stderr output.  This can lead to problems,
e.g. if the git config file is unreadable for some reason (permissions
etc).

This fixes the issue by simply ignoring the stderr output.
Add spring to bundled commands
added useful mvn aliases
Plugin jump: autocompletion for numbers and dots

This change fixes the autocompletion for marks which contain numbers or dots.

Fixes #2578

`\d` in sed regular expressions doesn't work (see http://stackoverflow.com/questions/14671293/why-does-d-doesnt-work-in-regular-expression-in-sed)
Add /usr/bin/subl path for who has linked sublime text there
Add Composer's global binaries to PATH