emails now only send by category
default category set in INI is 'all', which is special-cased
all other emails send only if their category is active

 we can use this turn on and off email types per-event
fix swag attribute for magstock, part 2
these files need to be updated in magstock
Merge pull request #276 from EliAndrewC/ftr_swag_name_correct

fix swag attribute for magstock
Merge branch 'master' into develop
Merge pull request #275 from EliAndrewC/ftr_noise_levels

add noise level option to magstock
WIP email previewing
for viewing emails that are supposed to go out when SEND_EMAILS is False
mostly for debugging but could later be refactored into an email 'queue' system
Merge branch 'ftr_email_categories' into ftr_email_previews
email previewing, merged with email category branch
for viewing emails that are supposed to go out when SEND_EMAILS is False
public-facing text updates
Merge remote-tracking branch 'origin/master' into develop
Merge branch 'fix_conf_email_text' into develop
Merge branch 'ftr_email_previews' into develop