Capacity Increases: add/remove signatures

- Removed one signature per request
- Add several new ones
- Haven't figured out how to handle company sigs yet

_includes/bitcoin-core/capability-increases-sigs.md

@@ -5,6 +5,7 @@ http://opensource.org/licenses/MIT.
 
 - [Adam Back](https://github.com/adam3us)
 - [Alex Morcos](https://github.com/morcos)
+- [Aaron Voisine](https://github.com/voisine)
 - [Ben Davenport](https://github.com/bpdavenport)
 - [Ben Gorlick](https://github.com/bgorlick)
 - [Bram Cohen](https://github.com/bramcohen)
@@ -34,8 +35,8 @@ http://opensource.org/licenses/MIT.
 - [Lawrence Nahum](https://github.com/greenaddress)
 - [Luke Dashjr](https://github.com/luke-jr)
 - [Mark Friedenbach](https://github.com/maaku)
-- [Marshall Long](https://github.com/FinalHash)
 - [Eric Martindale](https://github.com/martindale)
+- [Manuel Aráoz](https://github.com/maraoz)
 - [Marco Falke](https://github.com/MarcoFalke)
 - [Matt Corallo](https://github.com/TheBlueMatt)
 - [Midnight Magic](https://github.com/midnightmagic)
@@ -45,9 +46,11 @@ http://opensource.org/licenses/MIT.
 - [Obi Nwosu](https://github.com/obi)
 - [Patrick Strateman](https://github.com/pstratem)
 - [Pavel Janik](https://github.com/paveljanik)
+- [Peter Todd](https://github.com/petertodd)
 - [Pieter Wuille](https://github.com/sipa)
 - [Randy Waterhouse](https://github.com/randy-waterhouse)
 - [Rodolfo Novak](https://github.com/nvk)
+- [Ruben de Vries](https://github.com/rubensayshi)
 - [Suhas Daftuar](https://github.com/sdaftuar)
 - [Theymos](https://github.com/theymos)
 - [Thomas Kerin](https://github.com/afk11)