Getting vdirsyncer & khal working, updating offlineimap to work with fastmail, misc spacemacs config updates

vdirsyncer/config

@@ -4,6 +4,7 @@
 [general]
 # A folder where vdirsyncer can store some metadata about each pair.
 status_path = ~/.vdirsyncer/status/
+password_command = ~/dotfiles/bin/decrypt_password.sh
 
 # CONTACTS
 #[pair google_contacts]
@@ -56,21 +57,21 @@ status_path = ~/.vdirsyncer/status/
 #verify = True
 
 # CALDAV
-[pair google_calendar]
-a = google_calendar_local
-b = google_calendar_remote
-#collections = private,work
+[pair fastmail_calendar]
+a = fastmail_calendar_local
+b = fastmail_calendar_remote
+collections = ["from b"]
 
-[storage google_calendar_local]
+[storage fastmail_calendar_local]
 type = filesystem
 path = ~/Calendars/
 fileext = .ics
 
-[storage google_calendar_remote]
+[storage fastmail_calendar_remote]
 type = caldav
-url = https://www.google.com/calendar/dav/dustinswan@gmail.com/user
+url = https://caldav.messagingengine.com/
 auth = basic
-username = dustinswan
+username = dustinswan@fastmail.com
 #verify = True
 
 # Optional: Specify a time range which should be synchronized. Either both