Elm make generates broken build if repo name contains dots

[Leden]

For example, "repository": "https://github.com/leden/lesnov.me.git" would be a completely valid repo name for Github, but as Elm make uses this piece to generate function names without sanitizing it first, it seems, the following happens:

// ...
var Elm = {};
Elm['Main'] = Elm['Main'] || {};
if (typeof _leden$lesnov.me$Main$main !== 'undefined') {
    _leden$lesnov.me$Main$main(Elm['Main'], 'Main', undefined);
}
// ...

See how the dot sneaked into the expression and ruined it?

When trying to run it, the following error happens:

Uncaught ReferenceError: runElmProgram is not defined
    at Main.elm:10
(anonymous) @ Main.elm:10

Should do some basic sanitization on such parameters, I think, and either fail loudly and ask the user to rename the repo, or escape dots and other possible trash silently. What do you think?

UPD: Some details on my report to comply with the checklist: My OS is Ubuntu Xenial 16.04.4 The browser is Chromium 64.0.3282.167 (Official Build) Built on Ubuntu, running on Ubuntu 16.04 (64-bit)

$ elm --version
0.18.0

[process-bot]

Thanks for the issue! Make sure it satisfies this checklist. My human colleagues will appreciate it!

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