Add vcspull - mass clone/update projects from vcs

[tony]

Why this framework/library/software/resource is awesome?

• Supports synchronizing git, svn and mercurial repositories
• Makes it easy to restore project layouts on newly formatted systems
• Makes it easy to see updates to your favorite open source projects. Type vcspull in the morning to grab all the latest code
• Supports adding git remotes (upstream repo + your fork)
• Declaratively set your projects via JSON or YAML configuration (Example configurations)
• Supports Python 2.7, 3.3+

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