staff can now edit presentations from detail page
staff users can now edit presentation info and speakers from the presentation's detail page
create documentation for schedule app with note about pres editing
staff users can download zipfile with sponsor data, weblogos and printlogos
get rid of unwanted commit and add sponsor data file to gitignore
Fix error-prone code and trim spaces from asset file names
Add auto-email to staff on sponsor signup
add eventbrite to requirements.txt
first half of sponsor-passes/eventbrite integration feature
Make request and fire off email to sponsors with discount code
Refactor for multiChoice, add ability to discount by lump sum or percent, and various bugfixes
replace inefficient code with generator
updates to settings
Merge branch 'sponsor_passes' into development

Conflicts:
	symposion/templates/dashboard.html

	modified:   .gitignore
	new file:   docs/schedule.rst
	modified:   requirements.txt
	modified:   symposion/schedule/forms.py
	modified:   symposion/schedule/urls.py
	modified:   symposion/schedule/views.py
	modified:   symposion/speakers/views.py
	modified:   symposion/sponsorship/admin.py
	modified:   symposion/sponsorship/forms.py
	modified:   symposion/sponsorship/models.py
	modified:   symposion/sponsorship/urls.py
	modified:   symposion/sponsorship/views.py
	modified:   symposion/templates/dashboard.html
	new file:   symposion/templates/emails/sponsor_passes/message.html
	new file:   symposion/templates/emails/sponsor_passes/subject.txt
	modified:   symposion/templates/schedule/presentation_detail.html
	new file:   symposion/templates/schedule/presentation_edit.html
	modified:   symposion/templates/sponsorship/detail.html
	new file:   symposion/templates/sponsorship/passes.html
	modified:   symposion_project/settings.py
	modified:   symposion_project/static/symposion/css/symposion.css