bootstrap logging
plug verbosity check for greater than 2
Merge pull request #152 from cordoval/152-show-git-commands-in-verbose-mode

This PR was merged into gushphp:master branch.

Discussion
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Show Git commands in verbose mode

For newcomers it will be easier to understand what Gush is doing by showing executed Git commands to them. I think we either can enable that mode by default or only when `-v` argument was supplied.

Commits
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ac3f9a5065034e7c091503118f612bed89bcd3d4 bootstrap logging cordoval
15c2a3e3f53d78c57abd5237bb793d5aa609f45a plug verbosity check for greater than 2 cordoval