Update membership.pillar

Author: Ducasse

membership.pillar

@@ -1,8 +1,13 @@
 !Membership
 
 By becoming a member of the European Smalltalk Users Group, you support ESUG's *actions to promote the use of Smalltalk>promotion.pillar* in both industry and academia. As a member, you get:
--Access to the esug mailing list (Only members can send emails to the list)
--The right to vote for board election
+- Access to the esug mailing list (Only members can send emails to the list)
+- Access to the mobility program
+- Access to the book sponsoring
+- Access to the scientific publication sponsoring
+- Access to the SummerTalk program
+- Access to the free books and other ressources
+- The right to vote for board election
 
 !How to become a Member