errorhandling on erroneous package.json

[hoppfrosch]

I have a package loaded within aris and created a metadata-file (package.json).

After closing aris, I manually edited the package.json file - and forgot an comma within the json-file.

Trying to start aris ... but nothing happened: no error-message or anything. Aris simply does not start due to error in package.json.

Better would be:

• Aris would give an hint on error in package.json
• Aris would start up with no package loaded (as the package.json of previously loaded package is invalid)

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Running ARIS commitID 6d73442

[Descolada]

I've pushed a commit that should fix this issue. Previously the message was printed only in the console log.