adding nodemailer to bundled dependencies.
fixing build
adding some more fields in the create lesson form.
merging conf
upgrading to new express
http://stackoverflow.com/questions/22202232/express-has-no-method-configure-error
updating express to the new version.
bundling more packages due to express update.
lergo-37 
Implementation for find usages for question
LERGO-39
adding questions create/update operations.
currently only "trueFalse" questions are supported.
fixing build.
LERGO-36 fixed.
Fixing Update issue in lesson and question
Merging files
Merge pull request #5 from lergo/lergo-37

Lergo 37
lessons belong to users.
Merge branch 'develop' of https://github.com/lergo/lergo-ri into develop
separating LessonsIndexCtrl from LessonCrl.
fixing some auto-save functionality.
refactoring LergoClient - moving LessonsService to a different file.
adding more details on the about page.
fixing build script
fixing build.