Merge pull request #7 from lergo/lergo-48

Lergo-48 : Implementing delete support for lesson step.
Merge branch 'master' of https://github.com/lergo/lergo-ui into develop
handling error on continuous save.
enriching the kitchen sink page.
styling the login page.
adding error handling for login page
login page hebrew support.
rtl support - more hebrew translations.
fixing lint problems.
updating angular to latest version.
creating a table to display questions.
sorting the "my lessons" table. adding dummy "invite" link.
setting angular version to 1.2.16
adding infrastructure to invite users for lessons.
styling up signup page.
Lergo-62 displau UI for Lesson
adding email templates
adding start of "forgot password" flow.
fixing duplicate options
adding remove to question.
adding some style to the page.
resolving the questions quiz view.
lergo-62 : display UI for lesson