Generate story with information from backend

[ning-y]

Features

• SET_ROLE and SET_USERNAME is replaced by SET_USER, which updates the state with all fields from GET /user
• Fix some dead links from the game (createInitializer.js)
• Fix a bug where landing on a 404 page from academy would mean that you could not navigate back to the academy
  • ...but not really. The bug is still there due to the nature of HistoryHelper. But I removed HistoryHelper from being saved in localStorage so that at least a hard refresh on the page would remedy this
• Allow users to receive new stories without having to log in and out
  • Previously, GET /user is only called on log in. Now, GET /user is also called at the Game component, if state.session.story is undefined.

Todos

• Implement logic for new field from backend attemptedAll

Resolves #152.

[coveralls]

Pull Request Test Coverage Report for Build 558

• 12 of 32 (37.5%) changed or added relevant lines in 8 files are covered.
• 23 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-0.3%) to 25.339%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/actions/session.ts	1	2	50.0%
src/sagas/backend.ts	1	2	50.0%
src/mocks/backend.ts	1	3	33.33%
src/components/academy/game/create-initializer.js	0	4	0.0%
src/components/academy/game/index.tsx	3	15	20.0%

Files with Coverage Reduction	New Missed Lines	%
src/components/academy/game/game.js	1	0.0%
src/mocks/backend.ts	1	25.4%
src/components/academy/game/create-initializer.js	1	0.0%
src/components/academy/game/index.tsx	2	20.0%
src/components/workspace/MCQChooser.tsx	18	8.51%

Totals
Change from base Build 545:	-0.3%
Covered Lines:	848
Relevant Lines:	2832

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💛 - Coveralls

[ning-y]

@remo5000 I'm using this PR to bump v0.1.7 to v0.1.8, so we need to merge #266 first if you want to include it in the next staging bump.