automagic v0.5.1

• added back install_package_guess, but removed ability to installed packages from GitHub based on a guess

automagic v0.5

• Deprecated the ability to install github packages with install_package_guess as it was causing installation problems on older versions of R due to githubinstall
• Fixed bug where duplicate packages would be returned if parsing more than one file in a folder
• Fixed bug where deps.yaml file with no github packages would fail
• Fixed bug that would duplicate packages in deps.yaml when parsing more than one file in a folder