[Closes #27] Prefer git protocol for deps
[Closes #27] Added TOC link
[Closes #27] Corrections
[Closes #27] Corrections
[Closes #27] Corrections
[Closes #27] Corrections
[Closes #27] Corrections
Merge pull request #37 from inaka/igaray.27.prefer_git_protocol

[Closes #27] Prefer git protocol for deps
Modified the contributing doc to conform to current rule format
Merge pull request #38 from inaka/igaray.contributing_format

Modified the contributing doc to conform to current rule format
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