Άσκηση 3η firebase-ionic#1

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euripas wants to merge 3 commits intojust-app-workshop:masterfrom

Commits on Apr 24, 2016

initialization of project
euripas
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Commits on Apr 25, 2016

feat firebase-service single article aquisition
euripas
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Commits on Apr 26, 2016

fix firebase article-controller refactoring and new icon
euripas
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