Merge branch 'release/0.0.3' into develop
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Fix for minitest 5.x
Typo correction.
Adds hash-like access to git config, spec for that, modifies the README file
Test update
Modifies info on naming branches in the README file.
Reformat tabs -> spaces
Reformat tabs -> spaces
Tweak specs
Delete rspec
Add pry-stack_explorer for development.
Merge branch 'develop' into new-feature
Corrects code showing the non/capturing difference, adds info on CONTRIBUTING.md.
Merge branch 'develop' of github.com:3ofcoins/minigit into develop
Creates CONTRIBUTING.md, fills with basic info.
Minor fix in CONTRIBUTING.md.
Changes output of git config deleting new lines.
Merge branch 'develop' into new-feature

Conflicts:
	README.md
Corrects errors from previous commit: class instance method, key & value in method names.