remove package doc

Merge pull request src-d#17 from alcortesm/fix-zlib-invalid-header

fix zlib invalid header error

Merge pull request src-d#12 from alcortesm/hotfix-close-packfile

missing call to Close on Fetch return value (ReadCloser)

Merge pull request src-d#11 from alcortesm/ignore-submodules

Ignore submodule dirs (empty directories without associated object)

Merge pull request src-d#10 from alcortesm/file-client

Adds external protocol insertion for the clients and protocol selection based on the scheme

Merge pull request src-d#9 from mcuadros/blame-cleanup

blame code reorganization, and mutting the test

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