Merge pull request #140 from jukra/master

Fixed syntaxes
Missing links between pages
Fixed quiz syntax
Syntax might been broken
Merge pull request #144 from merilainen-metropolia/gulp-quiz

Fixed gulp quiz syntax (issue #142)
Added hints to quiz
Hipsut it is
And some tweaks
The hipsut
Added hints
Merge pull request #148 from merilainen-metropolia/gulp-quiz

Gulp quiz fix
Merge pull request #146 from merilainen-metropolia/travis-quiz

Fixed travis ci quiz syntax (issue #145)
Merge pull request #147 from jukra/master

Syntax fixes again
Fixed and unified Sitespeed.io quiz syntax #141
Merge pull request #149 from tuunanen/master

Fixed and unified Sitespeed.io quiz syntax #141
Fix JSLint and JSHint quiz syntact #143
Merge pull request #150 from tariel/master

Fix JSLint and JSHint quiz syntact #143
Update assignment project link
Merge branch 'master' of https://github.com/paazmaya/modern-web-tools-with-node-js-book
Merge pull request #151 from tariel/master

Updated assignment link