Removed HTML escaping in ics file
Changed ordering of most member lists to alphabetically by last name

The following things were altered to the new ordering:
- Main member list
- T-shirt order
- Dropdowns when adding roles to events
- HoT view of timecards (timecards#view)

refs #187
Added "mark event complete" checkbox when emailing Received invoices

refs #188
Removed unrecognized pricing

refs #182
Sorted invoice lines by category

refs #162
Fixed issue with creating new invoices

refs #162
Removed redundant "Show full" link from event invoices

refs #190
Added RSS feed for texting call times to GroupMe via IFTTT
Added loan contract invoices

refs #192
Added email text for loan agreements

refs #192
Fixed text of textable flag on events form
Updated text of loan agreement

refs #192
Fixed organization event lists showing incorrect representative dates

Also removed some old code from Event

refs #194
Merge branch 'master' into production