Improve errored job reports, bug fixes

[roll]

• fixes Validation task raises an exception on invalid json #224
• fixes Validation task raises an exception on invalid datapackage #223
• fixes Better errored job reports #214
• fixes Support not only Tabular Data Packages #208

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Issues #224, #223 and #208 fixed by https://github.com/frictionlessdata/goodtables-py/pull/193 and issue #214 also improved by goodtables-py update + added more details about job conf validation errors.

[roll]

@amercader
please take a look - it should address all problems here - https://sentry.io/open-knowledge/goodtablesio-production/searches/642098/ - and also improve how GTIO reports to users about problems

[amercader]

Looks good @roll. I think we need to improve the way warnings are displayed in the UI but I'll create​ a new issue for this

[roll]

@amercader
I think we anyway should let Sam at least to review our latest report changes. Of course warnings should be improved. I could do it later if it will not be covered in #187

[ppKrauss]

Hum... year or gyear?

PS: gyear triggs an error.