Fixed line height for navbar

Resolves #128
Move more name options link in more places

Also get rid of extraneous form-group classes
Event name in attendee release

Resolves #136
Revert "Fixed line height for navbar"

This reverts commit ffde576a15655b6928c8498da80fc8964dc63c4d.
Revert "Event name in attendee release"

This reverts commit d8b1837f0eaacac06162536317909a8fc1b9c76a.
Explain survey at event creation

Resolves #114
Hopefully appropriately given my track record today.
Improvements to discount creation form
Improve Survey Form

Hide address unless relevant
Works toward #110
Added a link to Stripe's supported currencies

in event creation
For #75
Distinguish Brambling vs. Dancerfly SASS

Dancerfly SASS files:
- _dancerfly.sass
- _masthead.sass
- _variables.sass
Renamed layout templates to fit bootstrap
Our layout is inherently 12-based and it makes sense to name it that way.
Also deleted unused template; easy enough to make it again if we really want it.
Switched templates using __base to layouts/12

Because that makes more sense.
Made small centered layout template
Made standalone signup narrower
Smaller default container

lg no bigger than md
Stopped about buttons on splash from overflowing
Renamed smallest template to 12_xs
Added narrower layout for single-column forms

And updates to those forms
Made icons full-width in nav sidebar
Changed brand-primary and dashboard