Added tests for "/account set server"
Added tests for "/account set resource"
Added tests for "/account set password"
Added tests for "/account set muc" and "/account set nick"
Removed help->usage when not used in tests
Tests valid and invalid resource presence strings
Added tests for "/account set status"
Added tests for "/account set <status> <priority>" with invalid status
Added tests for setting presence priorities
Merge branch 'master' into otr