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Merge pull request #288 from jasonm23/app-icon-stuff

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Changed our setup code to allow for any level of submodules.
Took note of repl.open() bug; fixes #280.
Fixed potential bugs in hydra.exec() by making it less convenient to use.
Added hotkey.inputsourcechanged(); fixes #289.
WIP code for hydra.packages; part of #192, kind of.
Update README.md
Starting on license verification code.