fix(cookie cutter): fixes the misuse of `repo_name`/`project_name`

* project_name may contain spaces, do not use for generating emails
* 'name' variable in package.json is used by Gruntfile to figure-out
   the directory structure of project, so `repo_name` is what must
   be used here
chore(config): makes debug=False in production

* Make debug=False by default and enable it only
  in Local/Development environment.

Fixes: https://github.com/pydanny/cookiecutter-django/issues/75
fix(app/user): use proper UserAdmin auth form

* use `django.contrib.auth.admin.UserAdmin`.
* using `admin.ModelAdmin` do not provide forms to
  properly handle `passwords`

[1]: https://docs.djangoproject.com/en/dev/topics/auth/customizing/#custom-users-and-the-built-in-auth-forms
Merge pull request #92 from theskumar/fix/cookiecutter-variable

fix(cookie cutter): fixes the misuse of `repo_name`/`project_name`
Merge pull request #93 from theskumar/disable-debug-in-production

chore(config): makes debug=False in production
Merge pull request #94 from theskumar/fix/user-admin

fix(app/user): use proper UserAdmin auth form
upgrade dependencies to latest versions available
Merge pull request #97 from luzfcb/upgrade-libraries

upgrade dependencies to latest versions available
update django version to latest
Merge pull request #99 from luzfcb/patch-1

update django version on requirements file to latest
Install grunt, not air. Thanks @merwork!
added Heroku SENDGRID deploy docs, makes more explicit deploy instructions and add links to relevant projects
Simplified configuration database on Heroku.
See more: https://devcenter.heroku.com/articles/heroku-postgresql#establish-primary-db
Merge pull request #100 from luzfcb/missing-docs

Added missing docs and others
Fix missing javascript rendering in reset_password view.
update django-debug-toolbar config

See more: http://django-debug-toolbar.readthedocs.org/en/1.2/configuration.html#toolbar-options
Merge pull request #101 from luzfcb/patch-2

update django-debug-toolbar config to fix DeprecationWarning