Add meetings

wiki/src/contribute/calendar.mdwn

@@ -8,10 +8,20 @@ All times are referenced to Berlin and Paris time.
 
 * 2019-08-07, 16:00 Fundraising meeting
 
+* 2019-08-08, 11:00 Accounting meeting
+
+* 2019-08-21, 16:00 Fundraising meeting
+
+* 2019-08-22, 11:00 Accounting meeting
+
 * 2019-09-03, 16:00: [[Foundations Team|contribute/working_together/roles/foundations_team]] meeting
 
 * 2019-09-03: **Release 3.16** (Firefox 60.9, bugfix release — intrigeri is the RM)
 
+* 2019-09-04, 16:00 Fundraising meeting
+
+* 2019-09-05, 11:00 Accounting meeting
+
 ## 2019Q4
 
 * 2019-10-03, 16:00: [[Foundations Team|contribute/working_together/roles/foundations_team]] meeting