Adds set_quantity as a method on CartController.

Refactors add_to_cart to be in terms of set_quantity

Update to latest build system

Closes #3

Don't show unpublished schedule info to non-staff.

Add checks to schedule_list, schedule_list_csv, and
schedule_presentation_detail views to verify that either schedule is
published or that current user is staff before displaying information.

See c7592bc33e2626d84ec46fe1e7ba8e05c73ef74c.

Make sponsor description default empty string.

Set sponsor listing text to an empty string instead of None. If a
sponsor doesn't have a benefit named "Sponsor Description", this will
prevent the text "None" from displaying in the Django template.

Python3 compatibility

Update the StringIO import in symposion.sponsorship.views

Remove duplicate Slot.save method.

Remove "save" method in Slot model since #107 added another "save"
method. This fixes the automated test failures in Travis CI.

Loosen Django package requirement.

Loosen Django requirement to allow versions greater or equal to 1.8.5,
instead of mandating 1.8.5. This makes it easier to use newer releases
of Django (e.g. the bugfix and security releases 1.8.6 or 1.8.7) with
symposion.

fix pip8 warnings

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Massively upgrade symposion

* Remove markitup (to be replaced with Ace editor)
* Use DUA decorators
* Removed custom signup bits
* Upgraded dependencies
* Added migrations
* Namespaced template locations
* Removed html5parser/sanitizer (for now) - parsing functionality
should be moved out entirely to a hooks
* Replaced ProposalScoreExpression object with a function that returns
F() expressions

Slot: gen name retrun by __str__() when save()

This name also used for itemize slots on admin screen

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Replace django-timezones w/ django-timezone-field

django-timezones does not support Python 3. django-timezone-field is
a revived fork that does.

For some unknown reason django-timezone-field's TimeZoneField does
not like positional arguments, so I changed to first argument to a
kwarg "verbose_name".

i18n all part

- forms for labels and helps
- views for success or warning messages
- apps and models verbose_names for admin

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

python3 compatibility

- Things are suggested in python3 porting guide.
https://docs.djangoproject.com/en/1.8/topics/python3/

1. adding ```from django.utils.encoding import
python_2_unicode_compatible```

2. ``` __str__``` instead of ```__unicode__```
https://docs.djangoproject.com/en/1.8/topics/python3/#str-and-unicode-methods

3. Adding ```from __future__ import unicode_literals``` at the top
of your Python modules
https://docs.djangoproject.com/en/1.8/topics/python3/#unicode-literals

4. Removing the `u` prefix before unicode strings;
https://docs.djangoproject.com/en/1.8/topics/python3/#unicode-literals

- also closed #66

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

slot name includes rooms

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

admin: inline edit day and slotroom

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

admin: inline edit section

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

add more addtitional speakers constraints

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

fix OrderedDict import error in Py2.6

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

form key ordering: detect django version

- Django 1.6 and before use SortedDict instead of OrderedDict
It detect version and return proper dict for key ordering.
- field deletion is done by reorder funcion.

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

reorder signup fields

current implementation is not work on Django 1.7+
anymore. This modification activate feature
in Django 1.7+ and drop support for Django 1.6 and before.

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

drop old unused chosen

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

sponsor benefit type richitext, simple and option

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

sponsor benfit is complete?

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

sponsorship benefit relation administration

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

distribute locale files

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

i18n sponsor fields

Feedback from PyConJP development

```
commit 5973e32ebdc231b209b5c058664e8b2b4a1dbc54
Author: MURAOKA Yusuke <yusuke@jbking.org>
Date: Mon Mar 31 15:35:40 2014 +0900

introduce Benefit.content_type which is used to display localized
text
```

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

admin contact

Feedback from pycon development

```
commit eb3261c12c910ec562e016f10431cc48747baef8
Author: Dan Poirier <dpoirier@caktusgroup.com>
Date: Wed Aug 21 11:51:20 2013 -0400

Enhanced sponsor admin page

```

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

display_url

Signed-off-by: Hiroshi Miura <miurahr@linux.com>