v0.43 release which fixes pickle bug.
v0.43 release which fixes pickle bug.

awurster/jira,pycontribs/jira,kinow/jira,akosiaris/jira,milo-minderbinder/jira,rayyen/jira,m42e/jira,VikingDen/jira,dwmarshall/pycontribs-jira,akosiaris/jira,stevencarey/jira,stevencarey/jira,milo-minderbinder/jira,dbaxa/jira,dbaxa/jira,kinow/jira,pycontribs/jira,m42e/jira,rayyen/jira,VikingDen/jira,dwmarshall/pycontribs-jira,coddingtonbear/jira,awurster/jira,coddingtonbear/jira