Merge pull request tinode#376 from tinode/cluster2

Memory leak in cluster sessions, cosmetics for monitoring

Merge branch 'devel' into template

provided package descriptions for all packages

Merge branch 'devel'

Merge branch 'devel'

better error text

(cherry picked from commit a57701b)

bump database version and provide db upgrade logic

update android screenshots

fix for maxresults being reset on adapter.Open()

pubm chatbot version